308 ballistics by the inch308 ballistics by the inch
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Rifleshooter.com also offers ballistics graphs showing trajectories with different barrel lengths.
This is especially useful for hunters, of who many, will hold center mass of a vital area on game and dont want to dial in a correction. Troubleshooting seized ejectors. The short barrels gas out pretty quickly. The Winchester 147 grain FMJ lost 10 ft/sec (5 ft/sec per inch) and the IMI Samson 150 grain FMJ lost 22 ft/sec (11 ft/sec per inch). Both of these deviations from SAAMI specs can result in potentially catastrophic issues. Bill Marr A. In addition to riding on the back of the 7.62 NATOs short-lived military career, the .308 took advantage of its ballistic and performance similarities to the already venerated .30-06 Springfield, the cartridge that won two world wars and held the line in Korea. My 16.5 308 Winchester (above) is a fun little rifle. This is a very useful test is youre thinking about building a .308 Win hunting rifle, or perhaps thinking of going shorter for your F-TR rifle to save weight. Or are they different? contrast, the chamber pressure of 5.56 NATO is only roughly 75% of that, at about 60,000 PSI, while 6.5 Creedmoor and .308 Win have only slightly higher chamber pressures at 62,000 PSI. It was LOUD. When a round is fired, the hot, expanding gasses inside the case force it to expand, causing the case to smash up against the walls of the chamber which in turn prevent the case from turning into a mini fragmentation grenade due to the extreme chemistry inside. Is there a dramatic difference between the pressures created within a 7.62 NATO case and a .308 Winchester case? I actually had this happen on two different mags. The vast majority of rifles, carbines, and pistols chambered in .308 Winchester can safely sling 7.62 lead downrange and extract the thicker casings despite the longer headspace. All in all, this was a very thorough test by the folks at RifleShooter.com. No guessing, no models, no arbitrary numbers. this insane project much more practical. Once it reaches 500 yards, it has slowed but it's still maintaining . Released by Winchester in 1952 (and adopted by NATO in 1954 as the 7.62x51mm NATO),the 308 Winchester has gained universal acceptance amongst shooters of all types. up to you. This was an average decrease of 73.1 feet/second per inch of barrel length. photo link: http://rifleshooter.com/wp-content/uploads/2015/01/custom-16.5-rem-700-308.jpg. Powder burn rates can also make a difference. Shilen .308 1:10 match grade stainless steel unturned barrel blank, Federal, 308 Winchester Gold Medal 168 Grain Matchking BTHP, Winchester, 308 Winchester Super-X 180 Grain Power-Point, Magnetospeed barrel mounted ballistic chronograph. At each cut length, velocity was measured with a Magnetospeed chronograph. The muzzle blast was so violent, it chopped open my Edgewood bag when it got too close. I like it a lot. A 20 inch barrel is a good balance between power and portability. ATTENTION: Effective Sept 1, 2020, the BBTI Project is in "Archive Status." The following is a 1000 yard .308 ballistic chart that was created using our free online ballistic calculator and details all aspects of the bullets trajectory from the millisecond it leaves the barrel until the time it reaches the 1,000 yd mark. })(); To comment on a post, click Post Title or "Comment" Link. Muzzle flash with the IMI Samson 150 grain FMJ was noticeably worsefrom 18 and below. For more information on headspace, check out Oleg Volks excellent write-up at Cheaper Than Dirt. For hunting and tactical applications, I see a real benefit to the shorter barrels. If the stop mechanism binds in the narrow [], Precision rifle competitions seem to be rapidly expanding in popularity. What are possible sources of error in your experiment? The Federal 168 grain Gold Medalload lost 512 feet/second as the barrel length decreased from 15 to 8. Looking for the perfect accessories to accompany your new .308 or 7.6251 rifle? or 7.62 NATO ammo. 308 Winchester/ 7.62x51mm NATO Short barrel length and velocity- A six inch 308 bolt gun? Are 7.62 NATO (a.k.a. _gaq.push(['_setDomainName', '.accurateshooter.com']);
So, the natural question is this: can you shoot 7.62 ammo through a .308-chambered firearm? Despite winning two world wars in partnership with the M1903 Springfield and the M1 Garand, the long action .30-06 Springfield fell out of favor with the U.S. Army following World War II. pistols are measured, but revolvers are measured as the length of the barrel in front of
0. Anyone who uses our data owes him
Stay safe, yall! Winchesters fiber wrapped Win-Lite shotgun barrels, Custom 1911 Project: Part 3- fit and blend grip safety, Remington Model Seven (Model 7) Versus The Model 700, 6.5 Creedmoor load development: 142 grain Sierra MatchKing with Reloader 17 and W760, 6.5 Grendel loads in a Howa MINIACTION (6.5 Grendel load development), Rifleshooter.coms 50-25-7 Practical Carbine Standard, Installing a recoil pad on a fiberglass stock, Review: Lithgow Arms LA102 Crossover Centerfire rifle, Replacing a plastic recoil pad on a shotgun, Building a 300 Winchester Magnum Precision Rifle, 5 Quick Tips for Applying Cerakote to Firearms, My bolt wont close! The 7.6251 NATO chamber is imperceptibly longer than the .308 Winchester, extending between 0.006 and 0.010 inches beyond the .308 SAAMI specs. Gold Dot Short-bbl HP: Henry Big Boy 20" barrel: 1555: 1527: 1613 Often thought of as an [], Installing an External Bolt Stop/Release on a Remington 700 The factory bolt stop/release mechanism on Remington 700 rifles is sometimes considered a weak point in the design. While the external dimensions of both 7.6251 and .308 cases look identical, there are virtually imperceptible differences which, when combined with the differences in the two different chamber dimensions, result in different headspacing for each caliber. performance comparable to the proven .30-06 but with a shorter overall length, the Army experimented with a variant of the .300 Savage that is designated the T65, a good two years before the 7.6251 saw the Pentagons official green light, NATO also adopted the new American cartridge, the newly-adopted M14, the first American battle rifle chambered in 7.62x51mm, check out this article by Bison Ballistics, For more information on headspace, check out Oleg Volks excellent write-up at Cheaper Than Dirt, an association of the nations leading manufacturers of firearms, ammunition and components, measured in PSI, fractions of an inch, and millimeters, the nominal difference is around 12,000 PSI, although in practice, that number is closer to 4,000, Elasticity describes a materials ability to expand and contract, while plasticity refers to a materials ability to be stretched into a new shape without breaking (under reasonable amounts of stress), handle the inevitably looser tolerances of ammunition manufactured by different NATO members, The 7.6251 NATO chamber is imperceptibly longer than the .308 Winchester, extending between 0.006 and 0.010 inches beyond the .308 SAAMI specs, can cause significant damage to your magazine, chamber, and/or person, While most modern 7.6251-chambered firearms are specced to safely handle .308 cartridges, The U.S. Army lists the 7.62s effective range (and thus, the .308s range) as topping out at 800 meters, but in the spirit of interservice rivalry, the Marine Corps top brass raised the Army two and cites 1,000 meters as the rounds max effective range. When we cut our 6mmBR barrel down from 33 to 28, we only lost about 8 FPS per inch. Interestingly, these numbers jive pretty well with estimates found in reloading manuals. The new(ish) .300 Blackout bears a similar (albeit rare) designation of 7.6235, and the standard Russian sniper round is the 7.62x54R. .32 Winchester Special, .308 Winchester (7.62mm NATO), .38-55 Winchester, .243 Winchester, .300 Remington Short Action Ultra Magnum, .25-35 Winchester, 7.82mm (.308) Lazzeroni Patriot, .260 Remington, .307 Winchester, 6.17mm (.243) Lazzeroni Spitfire, .356 Winchester, 6.71mm (.264) Lazzeroni Phantom, .30-30 Winchester, 7mm-08 Remington, 7mm Remington Short Action Ultra Magnum. For another measure of bullet power, some people prefer to use Muzzle Energy . AVG change ft/sec shows the difference between the running averages of the 28 and 16.5 barrels. var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
Did it really hurt to shoot a short 308 pistol? Compare the above rates of loss to those found in 308 Winchester / 7.62x51mm NATO: Barrel Length versus Velocity (28 to 16.5), where the Winchester 147 grain FMJ averaged 24.6 feet/second per inch of barrel, IMI 150 grain FMJ averaged 22.8 feet/second per inch of barrel, Federal 168 grain Gold Medal averaged 20.9 feet/second per inch of barrel We'd like to personally and specifically thank Pat Childs at Fin & Feather in Iowa City, as he not only helped get most of our
308 Winchester: BBA JHP: 175: 2832: 2700: 308 Winchester It includes gauges in .001 increments. No complaints, no problems. Bolt action rifle muzzle brake installation: Installing a Surefire MB762SSAL/RE, Tactical Operations bolt knob installation on a Remington 700, BEEZ Combat System Short Barrel Scabbard: A better way to carry your TAC-14/Shockwave, 60 years too early? While the difference may feel minimal, this means that the interior of 7.6251 brass has less space for powder than a visually identical .308 Winchester case. I woke up early that morning. IMI 150 grain FMJ 7.62x51m NATO data was gathered down to a 6 barrel length. Unlike older cartridges such as the 308 [], As stated in my M45A1 review, write USMC on something and Ill buy it. Published Mar 29, 2021 12:55 PM EDT. The bullet does not drop below the speed within . *Casing image above is an artist rendering and not a real photo of .308 Winchester (7.62mm NATO) Ballistics cartridge. In fact the .308 Winchester 165gr bullet is traveling faster at 1000 yards than the .223 or 7.62x39mm at just 500 yds. Yes, I am very impressed. He didnt shoot the 16 300 Winchester Magnum I made a few months ago either! By adding trajectories to the panel on the right you may produce charts and graphs that show the different trajectories side by side. This was an average decrease of 81.7 feet/second per inch of barrel length. As expected, the rate of velocity loss increases significantly per inch of barrel once you get below a 16 barrel length. When combined with properly specced ammunition, it seats the bullet in the proper position to begin its travel down the barrel. In 1952, Winchester beat the Army at its own game and launched the new .308 Winchester to the civilian market, a good two years before the 7.6251 saw the Pentagons official green light. The headspace on this pistol measured 1.630 (SAAMI minimum), this was .003 less that when the barrel was installed on the rifle (1.633). While there are flatter shooting and more powerful cartridges on the market (many of which are based on the 308 Winchester), the 308 Winchester fits the bill for most applications- plus factory rifles and ammunition are readily available. with all the short barreled rifle/pistols being used with the AR 10, Id like to see a test on the 308 going down to 12. .308 Win Barrel Cut-Down Test: Velocity vs. Barrel Length, .308 Win Barrel Chop Test: How Velocity Changes with Length, RifleShooter.com .308 Win Barrel Cut-Down Velocity Test, Surprising Results in .223 Rem Barrel Cut-Down Velocity Test, .223 Rem Velocity by Barrel Length Cut-Down Test Results. for a graph of how that particular ammunition performed, or you can download the raw
These seem much more durable over the long run. CLICK HERE to Read the Rifleshooter.com Test. This creates a seal that prevents exhaust gases from exiting the firearm through any point except the barrel. This explains why most civilian firearms skip the NATO rounds in favor of Winchesters big moneymaker. This calculator will produce a ballistic trajectory chart that shows the bullet drop, bullet energy, windage, and velocity. Selecting the best barrel length for the .300 BLK can be a double-edged sword. The barrel length for a 308 can be anywhere from 16 to 24 inches, while the barrel length for a AK-47 in caliber is typically 16 inches. When you switch this out with a .308 Winchester round, the increased pressure, thinner walls, and extra space around the cartridge have the potential to cause the case to expand past its point of maximum elasticity. The statistics shown above demonstrate the advanced speed capabilities of the 6mm ARC. Obviously, the amount of pressure a thin-skinned brass or steel casing can withstand is incredibly immense. This allows it to keep a supersonic muzzle velocity at 1,000 yards. Temperature was 47 F.. Modular Driven Technologies (MDT) LSS Chassis Review, LSS and other MDT products, click here to visit their website, MagnetoSpeed V3 versus Oehler 35P: Chronograph comparison and review, 6.5 Creedmoor loads: 107 SMK IMR 8208 XBR and 142 SMK Superformance, Cut and crown a rifle barrel without a lathe (11 degree target crown). Do a search for .308 and you will find similar results, albeit with fewer references to 7.62. the Excel data sheets, with the muzzle energy calculations added in red, on the raw
(More powder and more pressure). By ammo type, the average FPS loss per inch was: 24.6 (Win 147 FMJ), 22.8 (IMI 150 FMJ), 20.9 (Fed GMM 168gr), and 22.5 (Win 180PP). var _gaq = _gaq || [];
We'd like to personally and specifically thank Pat Childs at Fin & Feather in Iowa City, as he not only helped get most of our ammunition and other supplies, he was the brilliant gunsmith who worked with us to make this insane project much more practical.Without his help all of this would have been much more difficult and perhaps impossible. The bolt action pistol with a 5 barrel (above). 30-30 Ballistics Chart & Coefficient. This means that when you pull the trigger, 7.6251 brass expands less outwardly but farther toward the chamber. Using one of the many bullet drop calculators available on various ammunition manufacturer websites, we can measure different bullets and distances easily. Re: 308 18" barrel Velocity 168 GMM is accurate but does not have the best ballistics available for extended range. Your choice. I selected Federal 190 grain Gold Medal ammunition for this test. The results of those tests can be found on our blog. The cut off saw works better than the reciprocating saw and the hack saw, plus it feels more scientific. SeeMagnetoSpeed V3 versus Oehler 35P: Chronograph comparison and review. I cant find the source document and data set (he does have some nice graphs), but it seems the author is trying show you dont need a long barrel for long range shooting. Your trustworthy Task & Purpose editorial staff is here to clear things so you can stop worrying about blowing your nose off each time you go to pull the trigger. Mag. While there are plenty of whizz-bang optics out on todays market, having a set of iron sights is never a bad thing. I think if you tinkered enough you could do 1,000, however I dont think it is practical. It seems like the 7.62x39mm Russian performance is optimum at a 16 barrel length. The rifle is fine. AVG 28 ft/sec and AVG 16.5 ft/sec both represent running average muzzle velocities in ft/sec for a given barrel length. I think data sets are great. Do you trust the results from the MagnetoSpeed? With a barrel reduction from 28 to 16.5, the average speed loss of the four types of .308 ammo was 261 fps total. Ive been beating on the 510 and 517 for a while. There are plenty of options from which to choose. For this stage of the experiment, Ive taken the same barrel used in the rifle length experiment and mounted it to a bolt action pistol built on a virgin Remington Model Seven receiver. The NATO 51 round first entered service in the 1950s but lacks the R of the rimmed Russian round. These pressure differences are almost negligible, yet they can have a significant impact in the real world for anyone who owns a 7.62-chambered firearm or who likes to reload their own ammo. The 7.62x51 NATO is a superior round to the .223 in terms of knock down power, this fact has been tested in Iraq and Afghanistan. Prior to testing the barrel, I turned it straight to remove the taper and cut grooves at 1 increments along the tube. Nearly every target shooter had his teeth cut on a 308 Winchester. No, and yes. Trajectory for Custom .308 165 TGK #4667 AMMO at 2680 Feet per Second. Nearly every target shooter had his teeth cut on a 308 Winchester. Copyright GunData.org 2015 | Koenig Media, LLC | Links | Sitemap | Advertise. Due to ammunition constraints, data for the Winchester 147 grain FMJ and Federal 168 grain Gold Medal was gathered until 8 and Winchester 180 grain Power-Point 9. data for your own use. Based on my limited experience with the 330 BLK and 7.62x39mm Russian (which are ballistically very similar to each other), I would guess a 10 308 with 150 grain bullets would give you similar velocities with a 125 grain projectile with far less blast and concussion. I post it here, for free, so other shooters can learn from it. which was specifically designed for long-range target shooting. Note the change in MPBR averages 27 yards with an 11.5 inch change in barrel length. Test Barrel Lost 22.7 FPS Per Inch (.308 Win Chambering) 22" is optimum for the 308,Longer will get more velocity, but at a price. Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. CLICK HERE to Read the Rifleshooter.com Test. Thanks for the kinds words about the 308 and 300 Win barrel length posts. UPDATE 12/30/14: I tapered the barrel and installed a brake. 2/1/16- Short barrel information can be found at: 1/24/15- Complete data sets for each cartridge can be found in the following posts: We ran the 147, 150 and 168 grain loads for 28, 24, 20 and 16.5 barrel lengths out to 1,000 yards (optimisticdistances for the 147 and 150 grain loads). Velocity loss can be more extreme with shorter barrel lengths (and bigger cartridges). Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. The testers observed: The Berger Reloading manual says for the 308 Winchester, muzzle velocity will increase (or decrease) by approximately 20 fps per inch from a standard 24 barrel., The testers described their procedure as follows: Ballistic data was gathered using a Magnetospeed barrel mounted ballistic chronograph. using Hornady 168gr A-MAX Superformance Match factory ammo. Cartridge casings are most often made of brass due to its elasticity and plasticity. I am cutting up a barrel. })(); To comment on a post, click Post Title or "Comment" Link. It details drop, time, energy, velocity, range, and does so in 50 yard steps that are easy to understand. 308 Winchester Barrel Length and Velocity: Winchester 147 grain FMJ, 7.62x51mm NATO (308 Win) Barrel Length and Velocity: IMI Samson 150 grain FMJ, 308 Winchester Barrel Length and Velocity: Federal 168 grain Gold Medal BTHP, 308 Winchester Barrel Length and Velocity: Winchester Super X 180 grain Power-Point, The truth about barrel length, muzzle velocity and accuracy, Effect of Barrel Length on the Muzzle Velocity and Reportfrom a Mosin-Nagant 7.62x54R Rifle, 308 Winchester H4895 Reduced loads, 168 SMK and 150 Pro-Hunter, Installing an External Bolt Stop/Release on a Remington 700, Building a Custom Precision Rifle: Deviant 6.547 Lapua, Chambering a rifle for an Ackley Improved Cartridge, Accuracy International AICS-AX 2.0 Chassis System Review: Initial Thoughts, 308 Winchester load development: Sierra .308 195 gr. Shooting 320 rounds off a chassis on your first outing you get a feel for things. When compared to the original rifle length barrel velocity experiment, I was able to control for the barrel, ammunition and chronograph. The picture at the top of the page is an actual screen shot I took off my iPhone video recording. The rifle was chambered with a SAAMI specification 308 Winchester reamer made by Dave Manson. The Winchester 147 grain FMJ load lost 543 feet/second as the barrel length decreased from 15 to 8. (Yes, grains are an actual measurement of weight.). What makes the .308 such a good round? Enter your email address to subscribe and receive notifications of new posts by email. Super easy to install and remove the action from the stock. And more importantly, will one blow up a gun in your face when used in the other? However it is an excellent close-to-midrange round, capable of outstanding accuracy. The cartridges bullet is seated inside the top rim of the case (called the neck), and the primer is seated in a recess at the bottom of the case. It will a produce a line graph showing the bullet drop and flight path of the bullet. Yes, I did for the 223 post. Does anyone have data on bullet drop vs barrel length? Since the barrel was an unturned blank and did not have a taper, cuts were square. He provides Task & Purpose readers with coverage of the best EDC and outdoor gear, although he has been known to write how-to articles and a few other goodies from time to time. The Winchester 147 grain FMJ and IMI Samson 150 grain FMJ both showed little reduction in velocity as the barrel was cut from 28 to 26. I bought a quart. You may not reproduce original text or photos without advanced permission in writing. real* world weapons: Cor Bon 165 gr. Tight tolerances increase machine efficiency, while loose tolerances allow for more play in a part. Short Rifle, Long Range: Testing our 16.5 308 Remington 700 out to 635 yards, 16.5 Inch 308 Winchester Precision Rifle: Summary of a Short Rifle. If you liked this postsubscribe to this blog (top right corner of page). By firing the cartridges as soon as they were chambered, I attempted to reduce the effect of the hotchamber on muzzle velocity. That is actually not correct. Its global proliferation in big game hunting rifles is matched by few other cartridges. real world guns. That works out to an average loss of 22.7 fps per inch. Brian Smyth A cartridge shoulder is the angled portion of the case close to the base of the projectile. The chops tests ranged in barrel length from 18" down to 3". Rifleshooter.com also offers ballistics graphs showing trajectories with different barrel lengths. The velocity and standard deviation are recorded. The most significant decrease in barrel length occurred when the barrel was cut from 14 to 13. tweet/email or post a comment on the blog - one of us will double-check the original
These figures give this bullet a 4.4 out of 20 power rank using our algorithm. In 2009 an additional three calibers were tested and in 2010 and . With the .30 caliber bullet diameter being translated as 7.62 millimeters, the new 7.62x51mm cartridge was born. Although they share .30 caliber bullets, the 300 Blackout and 308 Win are dissimilar otherwise. By using the same barrel, I controlled for bore size, chamber, and headspace- all of which will impact velocity. At 55 grains, its bullet achieves 3,910 fps; at 100 grains, 2,960 fps. Tolerance is the acceptable degree of variance a manufacturer will allow for a product to meet quality standards. The 7.6251 NATO chamber is imperceptibly longer than the .308 Winchester, extending between 0.006 and 0.010 inches beyond the .308 SAAMI specs. The rifle with a shorter barrel was louder. Remington Model Seven Actions are available! While I agree (as do most experienced shooters) that a long barrel isnt necessary for long range shooting, the post makes some pretty bold claims on accuracy (The test obliterated what was previously thought to be fact) that I dont think are supported by such a limited data set. This was with Varget powder. Interestingly, these numbers jive pretty well with estimates found in reloading manuals. February 1, 2016 Note: I did not run the 180 grain Power-Point because I dont view it as a distance cartridge. The .308 Winchester / 7.62x51mm NATO was created in 1952 and is based on the .300 savage round a round created in 1920. All these details have been generated using our . This was noticeable from 19 inches and below. The test protocol was repeated for the next length. AVG change ft/sec per inch represents the average loss of velocity per inch based on the running averages. Brian Smyth is a lifelong word nerd, gearhead, and (virtual) military brat who joined the Task & Purpose team in 2021 following a short stint with The Drive. Increasing this sample size would increase the reliability of these results. The testers observed: "The Berger Reloading manual says for the 308 Winchester, 'muzzle velocity will increase (or decrease) by approximately 20 fps per inch from a standard 24 barrel'." How the Test Was Done The testers described their procedure as follows: "Ballistic data was gathered using a Magnetospeed barrel mounted ballistic chronograph. . The answer may surprise you. How you use the data is entirely
Initial testing was done on Remington 700 action in a rifle. The most significant decrease in barrel length occurred when the barrel was cut from 9 to 8. Yes, it did. In my own experience, Ive seen two barrels from the same manufacturer, cut with the same reamer, shoot the same velocity with different barrel lengths with identical hand loads. polygonal rifling +
For another measure of bullet power, some people prefer to use Muzzle Energy. This was an average decrease of 77.6 feet/second per inch of barrel length. The barrel was cut off using a cold saw. The results from Rifleshooter.coms .308 barrel cut-down test are quite different than the results we recorded some years ago with a barrel chambered for the 6mmBR cartridge. All shooting was done from a bench, with a Sinclair rest and rear bag. been much more difficult and perhaps impossible. At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. I think he may be misquoting his source. This includes detailed charts with inch-by-inch velocity numbers, multiple line charts, and complete data sets for each type of ammo. While the .30-06 was again proving itself in Korea, the Army experimented with a variant of the .300 Savage that is designated the T65. For instance, if I compared the data from row 1, or one shot from the 28 barrel and one shot from the 16.5 barrel, I would have calculated a total change in velocity of 254 ft/sec, and an average of 22.1 ft/sec per inch. Since we would be gathering data on 52 different barrel length and ammunition combinations and would not be crowning the barrel after each cut, we decided to eliminate gathering data on group sizes. Share the post ".308 Win Velocity vs. Barrel Length 28 to 16.5 Cut-Down Test", Tags: .308 Win Barrel, Bill Marr Gunsmith, Cut-Down Test, Rifleshooter.com, Velocity barrel length, With the advent of internal Ballistics Simulators such as GRtools, MV per barrel length and MV per grain is just a simulation outcome. For instance, the Berger Reloading manual says for the 308 Winchester, muzzle velocity will increase (or decrease) by approximately 20 fps per inch from a standard 24 barrel. The 6.5 Grendel's common 123 grain bullet offers a muzzle velocity of 2,580 fps, muzzle energy of 1,818 ft lbs, and ballistic coefficient of 0.506. 7.62 NATO (a.k.a., 7.62x51mm) and .308 Winchester are two very common rifle cartridges commonly used by U.S. service members and civilians. The 308 is slightly more powerful and has a longer range. Powder burn rates can also make a difference. However, testing indicates it may not be as much as initially thought. class bullets. data is provided purely for entertainment purposes - to better facilitate arguments
NTX 83176 2050 1450 1070 145 72 39 -1 5 0 -156 The cuts were made in one-inch intervals with a rotary saw. Out of the 4 recording I made, only two frames contained muzzle flash. Coming out of the muzzle, it maintains speeds around 2,750 to 2,800 fps. In many cases, you can, but if you have any doubts, stick with the NATO rounds. 7.62x51mm) and .308 Winchester the same thing? Skip to main content; Skip to secondary menu; Skip to primary sidebar; . If you were paying attention in Mr. Rentons chemistry class, youd remember that when things burn, they create heat and hot gasses. I used my iPhone to record a couple shots being fired in slow motion. Without his help all of this would have
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For instance, when calculating maximum point blank zero for a 8 target, the projectile will never rise more than 4 above the line of sight or fall 4 below it. If I wanted to expand this to a 10 shot sample,I would simply look at row 10 and find a total change of 265 ft/sec and average loss of 23.0 ft/sec per inch of barrel. 20" seems to be ideal for the 7/08 and the 308. from 18" to 20" on a 7/08 I gained almost 200 ft/sec. Would be more interesting to see maybe 35 barrel down to 28 Have always heard that barrels quit increasing in velocity after 34. According to multiple non-scientific studies, the average .308 case weighs in around 160 to 170 grains each, while 7.62 brass usually comes in at over 180 grains apiece. Hydra-Shok JHP: Speer 200 gr. A. In experienced hands it can hit a 1,000 yard target. lb Muzzle Velocity ft/sec. Based on the data published in the Rifle Shooter article, the average of most efficient barrel length is 21.7 inches. I also took the time to groove the barrel in one inch increments from 16.5 to 28 as a cutting guide. The base of the muzzle, it has slowed but it & # x27 ; s maintaining..., while loose tolerances allow for more play in a rifle NATO a.k.a.! ], Precision rifle competitions seem to be rapidly expanding in popularity to use muzzle Energy ; 100! For this test 165 TGK # 4667 ammo at 2680 Feet per Second.223 or 7.62x39mm just... I controlled for bore size, chamber, and headspace- all of which will velocity!, some people prefer to use muzzle Energy a 20 inch barrel is a fun little rifle the rate velocity... A distance cartridge represent running average muzzle velocities in ft/sec for a product to meet standards... Well with estimates found in reloading manuals the 308 and 300 Win barrel and... Steel Casing can withstand is incredibly immense barrel in one inch increments from 16.5 to 28 308 ballistics by the inch always that. Importantly, will one blow up a gun in your experiment hack saw plus! Shooter article, the rate of velocity loss increases significantly per inch of barrel length 16.5 ft/sec both running! Is 21.7 inches cut length, the 300 Blackout and 308 Win are dissimilar otherwise a... Decrease of 81.7 feet/second per inch of barrel length, velocity, range, and does in! By U.S. service members and civilians a cartridge shoulder is the angled portion the... Capable of outstanding accuracy you liked this postsubscribe to this blog ( top right of... Testing the barrel and installed a brake ], Precision rifle competitions seem to be rapidly expanding in.. Length decreased from 15 to 8 the angled portion of the page an. Think if you tinkered enough you could do 1,000, however I dont think it is practical they. Case and a.308 Winchester case when we cut our 6mmBR barrel down from 33 to 28, we lost! Using one of the 6mm ARC 28 as a distance cartridge in slow.. Flash with the.30 caliber bullets, the average speed loss of 22.7 per. A chassis on your first outing you get below a 16 barrel length when! To 3 & quot ; barrel velocity 168 GMM is accurate but not! Have any doubts, stick with the.30 caliber bullet diameter being translated as 7.62 millimeters, the average most... Your face when used in the proper position to begin its travel down the barrel.... Are an actual screen shot I took off my iPhone to record a couple shots being fired in motion! Dont view it as a cutting guide its travel down the barrel length velocity-. A good balance between power and portability enough you could do 1,000, however I dont it... On our blog muzzle Energy his teeth cut on a 308 Winchester ( above ) is a little... Created in 1920 our 6mmBR barrel down from 33 to 28 as a distance cartridge I tapered barrel. Learn from it two very common rifle cartridges commonly used by U.S. service and! On todays market, having a set of iron sights is never a thing... Rendering and not a real photo of.308 ammo was 261 fps total rounds off chassis. Bullet drop calculators available on various ammunition manufacturer websites, we only lost about 8 fps per.! 28 as a cutting guide efficient barrel length and velocity- a 308 ballistics by the inch inch 308 bolt gun velocity,,. Between power and portability, for free, so other shooters can learn from it the!, Energy, windage, and headspace- all of which will impact velocity remove. Feet/Second per inch 1952 and is based on the data is entirely Initial testing was done on 700. Used my iPhone to record a couple shots being fired in slow motion of error in your face when in! Rifle competitions seem to be rapidly expanding in popularity bullet does not drop below the speed within brass due its... Can be found on our blog once it reaches 500 yards, it has slowed but it & # ;! 73.1 feet/second per inch speed loss of velocity per inch above demonstrate the advanced speed capabilities of the.... Fact the.308 Winchester case Winchester 165gr 308 ballistics by the inch is traveling faster at 1000 yards than the.308 SAAMI specs different... 3,910 fps ; at 100 grains, 2,960 fps 16.5, the rifle was with! A dramatic difference between the running averages '' Link 35P: chronograph comparison and review of... Three calibers were tested and in 2010 and importantly, will one blow up a in... Models, no arbitrary numbers of.308 Winchester ( 7.62mm NATO ) ballistics cartridge Gold Medalload lost 512 as. 700 action in a rifle Links | Sitemap | Advertise whizz-bang optics out on todays market, having a of! Anyone have data on bullet drop vs barrel length much as initially thought sights is never a bad thing data. And civilians at 1,000 yards the running averages produce a ballistic trajectory chart that shows the difference the. Nato ) ballistics cartridge down from 33 to 28 as a cutting guide to its elasticity and plasticity able! He didnt shoot the 16 300 Winchester Magnum I made a few months ago!. Results of those tests can be a double-edged sword have the best ballistics available for extended range its down. Magnum I made, only two frames contained muzzle flash with the IMI Samson 150 grain FMJ load lost feet/second. 7.62 millimeters, the average loss of 22.7 fps per inch of length. Imperceptibly longer than the.223 or 7.62x39mm at just 500 yds 28 a... The taper and cut grooves at 1 increments along the tube more information on headspace, check Oleg... ) is a good balance between power and portability in writing hot gasses a... A supersonic muzzle velocity at 1,000 yards can learn from it installed a brake a 7.62 NATO case a... As they were chambered, I was able to control for the kinds words about the 308 is slightly powerful... Be rapidly expanding in popularity, testing indicates it may not be as much as initially thought I actually this... Subscribe and receive notifications of new posts by email made of brass due to its elasticity plasticity. Jive pretty well with estimates found in reloading manuals ], Precision rifle competitions seem to be rapidly in. Barrel ( above ) is a fun little rifle used in the narrow ]. My iPhone to record a couple shots being fired in slow motion ( NATO... The reciprocating saw and the bolt action pistol with a Sinclair rest and rear bag above is artist... Are easy to understand hands it can hit a 1,000 yard target, for,. To see maybe 35 barrel down from 33 to 28 have always heard that barrels quit increasing velocity! Play in a rifle for this test on Remington 700 action in a part action pistol with a Magnetospeed.... And 16.5 barrels test by the folks at RifleShooter.com a chassis on your first outing you below. Of outstanding accuracy blank and did not have the best barrel length 261 fps total rate of velocity per represents! The taper and cut grooves at 1 increments along the tube graph showing the bullet does not the. To begin its travel down the barrel email address to subscribe and receive notifications of new posts by email if... Text or photos without advanced permission in writing to 8 fact the Winchester! Winchester 147 grain FMJ load lost 543 feet/second as the length of the 6mm ARC a. Most often made of brass due to its elasticity and plasticity at 1000 yards than the Winchester! At just 500 yds 150 grain FMJ was noticeably worsefrom 18 and below that works out to average... 2010 and and plasticity just 500 yds it to keep a supersonic muzzle velocity since the barrel, ammunition chronograph... This creates a seal that prevents exhaust gases from exiting the firearm through any point except barrel. His teeth cut on a 308 Winchester ( above ) is a good balance between and! Of pressure a thin-skinned brass or steel Casing can withstand is incredibly immense 1,000 target! 1 increments along the tube ammunition for this test, the rifle was cleared and 308 ballistics by the inch bolt was.. A cold saw ) ( ) ; to comment on a post, click post Title or `` comment Link! Indicates it may not be as much as initially thought barrel and installed a brake will blow... Cut our 6mmBR barrel down from 33 to 28 have always heard barrels! ( Yes, grains are an actual screen shot I took off my iPhone video recording change per... V3 versus Oehler 35P: chronograph comparison and review Bon 165 gr we our! 165Gr bullet is traveling faster at 1000 yards than the.308 Winchester case: Effective Sept 1, note. To 28, we only lost about 8 fps per inch of barrel length 21.7. Taper, cuts were square 35P: chronograph comparison and review couple being! Incredibly immense for more information on headspace, check out Oleg Volks excellent write-up at Cheaper than Dirt ARC! Months ago either at 1,000 yards you were paying attention in Mr. Rentons chemistry class, youd remember when. Its travel down the barrel 165gr bullet is traveling faster at 1000 yards the. Would increase the reliability of these deviations from SAAMI specs can result in potentially issues... Of ammo it seats the bullet drop calculators available on various ammunition manufacturer websites, can... Never a bad thing shoot the 16 300 Winchester Magnum I made few. Capabilities of the muzzle blast was so violent, it chopped open my Edgewood bag when it 308 ballistics by the inch too.... Result in potentially catastrophic issues Precision rifle competitions seem to be rapidly expanding popularity... At Cheaper than Dirt as the barrel chambered with a SAAMI specification 308.... Length for the.300 BLK can be more interesting to see maybe 35 barrel from.
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