var _gaq = _gaq || []; These seem much more durable over the long run. We (well, Jim K, While U.S. military snipers and dedicated marksmen use a variety of different calibers, it appears the 7.6251 is here to stay for the foreseeable future. This resulted in a velocity loss of 118 feet/second. Trajectory for Custom .308 165 TGK #4667 AMMO at 2680 Feet per Second. A summary of the data for all four cartridges is provided below. Headspace is the distance between the base of a case and the portion of the case that locks the entire cartridge into place within the chamber. 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). Or are they different? All in all a great round that any good medium to large size game hunter can rely on. This results in a 7.62 case that is ever so . Youd think I was disappointed, however, there was a smile on my face. My 22 308 Winchester (above) is my favorite rifle to shoot. How much velocity do you think was lost, on average, for each 1 reduction in barrel length? Barrel length, Barrel length and velocity, Cartridge Selection which was specifically designed for long-range target shooting. He declined. Cartridge Type: RifleHeight: 2.015"Width: 0.473"Average FPS: 2681Average Energy: 2617Average Gr: 164Recoil: 1.95Power Rank: 4.4 of 20. 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. All content Copyright 1998-2018 Rifleshooter.com, FTC disclosure: some links on this site are monetized, Sig Sauer MCX Virtus PCP Air Rifle Review- Initial Impressions, Project Guns- Gunsmithing articles and posts, 308 Winchester / 7.62x51mm NATO: Barrel Length versus Velocity (28 to 16.5), 223 Remington/5.56mm NATO Barrel length versus Velocity- Short Barrels- 6 to 14 inches. Initial testing was done on Remington 700 action in a rifle. With barrels, one wonders Can a little more length provide a meaningful velocity gain? To answer that question, Rifleshooter.com performed an interesting test, cutting a .308 Win barrel from 28 all the way down to 16.5. numbers. I bought a quart. It details drop, time, energy, velocity, range, and does so in 50 yard steps that are easy to understand. Readers have continually asked for data from shorter barrels, so here it is! Time. With F Open shooting it does take a lot of testing over a long time to come up with the sweet spot of barrel length for one powder type for barrel, bullet brand/weight/and design alone. The chill from my snow covered feet started to make its way up my legs and into my back. Average velocity and standard deviation were logged for each round. 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. The Winchester 147 grain FMJ and IMI Samson 150 grain FMJ are both widely available and commonly used in semiautomatic rifles. At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. lb Muzzle Velocity ft/sec. Do a search for .308 and you will find similar results, albeit with fewer references to 7.62. 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). Blueprinting (Truing) a Remington 700 Action, 308 Winchester H4895 Reduced loads, 168 SMK and 150 Pro-Hunter H4895 is the first powder Hodgdon introduced. Ballistics by the Inch (often called BBTI) was a project to test the performance characteristics of a variety of common handgun calibers/cartridges. By adding trajectories to the panel on the right you may produce charts and graphs that show the different trajectories side by side. 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. 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. Temperature was 47 F.. 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. Based on the data published in the Rifle Shooter article, the average of most efficient barrel length is 21.7 inches. Just ask Todd Hodnett. Ballistics Rifle Ballistics Ammo Description Velocity (fps) Energy (ft/lb) Trajectory Tables (inches) CARTRIDGE BULLET ITEM # MUZ 100 yd 200 yd 300 yd 400 yd 500 yd MUZ 100 yd 200 yd 300 yd 400 yd 500 yd MUZ 100 yd 200 yd 300 yd 400 yd 500 yd V 17 Mach 2 15.5 gr. I selected Federal 190 grain Gold Medal ammunition for this test. The experimental cartridge fluctuated in case size before settling in at 51 millimeters long. This was an average decrease of 77.6 feet/second per inch of barrel length. By ammo type, the average loss per inch was: 24.6 (Win 147 FMJ), 22.8 (IMI 150 FMJ), 20.9 (Fed GMM 168gr), and 22.5 (Win 180PP). Published Mar 29, 2021 12:55 PM EDT. Read on, and it will all make sense. MagnetoSpeed barrel mounted ballistic chronograph. This creates a seal that prevents exhaust gases from exiting the firearm through any point except the barrel. Since all of the rounds were fired on the same day, I also controlled for ambient temperature. tweet/email or post a comment on the blog - one of us will double-check the original For example in this chart I lowered the velocity to . American Eagle (Federal) Full Metal Jacket Boat-Tail, 150gr. The velocity and standard deviation are recorded. Before I left the range, my long time friend arrived and started screaming that is the %$#& Ive ever seen. Note: I also fired a 30 shots of the IMI Samson 7.62mm 150 grain FMJ with the 28 and 16.5 lengths- Ill discuss why later. This includes detailed charts with inch-by-inch velocity numbers, multiple line charts, and complete data sets for each type of ammo. A 20 inch barrel is a good balance between power and portability. 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. This means throwing .308 rounds into the magazine of a 20-year-old M14 could set taxpayers back the cost of a new rifle and your medical bill at Walter Reed. rifle, you should be fine firing any modern commercial .308 Win. Temperature was 47 F.. I also took the time to groove the barrel in one inch increments from 16.5 to 28 as a cutting guide. The U.S. militarys 7.62 round is used for long-distance small arms engagements with light machine guns, sharpshooter rifles, and shorter-range sniper rifles. recording sheets. The statistics shown above demonstrate the advanced speed capabilities of the 6mm ARC. If the stop mechanism binds in the narrow [], Precision rifle competitions seem to be rapidly expanding in popularity. In fact the .308 Winchester 165gr bullet is traveling faster at 1000 yards than the .223 or 7.62x39mm at just 500 yds. Typical 308 ballistics chart (long range match shooting) Ballistics chart generated in Shoot! The rifle was chambered with a SAAMI specification 308 Winchester reamer made by Dave Manson. This chart shows velocity changes for all four ammo varieties: Summary of Findings: The average velocity loss per inch, for all four ammo types combined, was 22.7 FPS. You may not reproduce original text or photos without advanced permission in writing. About the short rifles, Ive written quite a bit about 16 308s: http://rifleshooter.com/2015/02/the-16-inch-308-winchester-bolt-action-rifle/. Does anyone have data on bullet drop vs barrel length? The picture at the top of the page is an actual screen shot I took off my iPhone video recording. You can then also add atmospheric conditions and angles. AVG 28 ft/sec and AVG 16.5 ft/sec both represent running average muzzle velocities in ft/sec for a given barrel length. Here is a list of all 23 different data sets we have tested. The contents of Rifleshooter.com are produced for informational purposes only and should be performed by competent gunsmiths only. No complaints, no problems. 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. The Army wanted a new rifle caliber with performance comparable to the proven .30-06 but with a shorter overall length, a new wonder cartridge. The test protocol was repeated for the next length. Before we start getting technical, lets take a few moments to define a few key terms and concepts that will make this conversation easier for everyone. It says that at around the halfway point of 500 yards the bullet will have slowed by 900fps and while that may sound bad it really isn't in terms of a percentage of initial velocity compared to say the .223 Remington (would be 1481fps from initial 3214fps) or the 7.62x39mm (would be 1066fps from initial 2349fps). The latter has nearly twice the propellant, and is therefore better able to fell very distant game. We selected an 8 MPBR for comparison purposes, since this was the same size vital area we used for the 300 Winchester Magnum and 223 Remington barrel length articles. So what does the charting of the .308 Winchester's external ballistics tell us exactly? 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. The 300 Blackout's sleeker bullet has a higher ballistic coefficient than the 5.5645, but with less speed its trajectory invariably arcs more sharply. At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. The NATO 51 round first entered service in the 1950s but lacks the R of the rimmed Russian round. In experienced hands it can hit a 1,000 yard target. The bottom picture is the first group I shot with the rifle, 5-shots, .785 including cold bore. I offered to let him shoot it. The cartridge is an ammunition assembly that combines the projectile (i.e., the bullet), propellant (or powder), and the primer (the ignition switch) into a single unit housed inside a cartridge case. Cartridge casings are most often made of brass due to its elasticity and plasticity. In308 Winchester / 7.62x51mm NATO: Barrel Length versus Velocity (28 to 16.5), I cut gathered empirical data for muzzle velocity on four different loads from 28 to 16.5. 28 barrel ft/sec and 16.5 barrel ft/sec represents the velocity data for the specific shot number. Thank you. var _gaq = _gaq || []; or remuneration from anyone. was measured from the end of the barrel back to the breech face. Would be interesting to find out. The muzzle blast from the short barrel eroded away some of the chassis! This means that when you pull the trigger, 7.6251 brass expands less outwardly but farther toward the chamber. ALL Bulletin content is copyrighted, 2023 AccurateShooter.com. That works out to an average loss of 22.7 fps per inch. The bolt action pistol with a 5 barrel (above). Drop (Inch) / 0-3.6: Our next 308 Win ballistic chart shows 130 grain Varmint & Predator rounds. Red Oak, White, or Chestnut for Deer Herd? The same barrel was then mounted on a bolt action pistol, and data was gathered for the same four cartridges from 14 to 6 in 223 Remington/5.56mm NATO Barrel length versus Velocity- Short Barrels- 6 to 14 inches. 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 The rifle was built with the following parts ordered fromBrownells: Brownells also provided the four types of ammunition used in this test: I did not true (blueprint) the action prior to threading and chambering the barrel. I think cutting the same barrel is preferable over comparing different barrels of different lengths. When combined with properly specced ammunition, it seats the bullet in the proper position to begin its travel down the barrel. 0. I did not control for barrel temperature. Get the latest in military news, entertainment and gear in your inbox daily. It was LOUD. While using calipers to measure the walls of fired brass may cause less than conclusive results, the scale doesnt lie. Obviously, the amount of pressure a thin-skinned brass or steel casing can withstand is incredibly immense. This was noticeable from 19 inches and below. _gaq.push(['_setAccount', 'UA-6323545-2']); _gaq.push(['_setDomainName', '.accurateshooter.com']); We may earn revenue from the products available on this page and participate in affiliate programs. .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. Barrel length, Barrel length and velocity, External Ballistic Data, Rifles You can find Share the post ".308 Win Barrel Cut-Down Test: Velocity vs. Barrel Length", Tags: .308 Win, 7.62x51 cut-down test, Barrel, Rifleshooter.com, Saw, Velocity. This results in a 7.62 case that is ever so slightly longer than its commercial brother. Some say they are the same caliber, while others warn of an exploding rifle if you use the wrong cartridge in the wrong chamber. What are possible sources of error in your experiment? If they did, I would have noticed the first round fired for every barrel length slower then the subsequent rounds. The answer may surprise you. A cartridge shoulder is the angled portion of the case close to the base of the projectile. No, and yes. Is there a dramatic difference between the pressures created within a 7.62 NATO case and a .308 Winchester case? Tolerance is the acceptable degree of variance a manufacturer will allow for a product to meet quality standards. Why you ask? It is too short to work with the TACMOD chassis forend, so now it is on the MDT LSS chassis. Powder burn rates can also make a difference. 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. Building something to cut up isnt the most rewarding experience; however, I plan on contouring and finishing the barrel to 16.25 (thats why I stopped at 16.5). I think data sets are great. So it's not a shocker that the .308 would be a good cartridge. cylinder gap + I actually had this happen on two different mags. 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. var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; Interestingly, these numbers jive pretty well with estimates found in reloading manuals. Stir crazy, I couldnt wait to get outside. As noted in the 223 short barrel experiment, as the barrel length decreases, the chronograph will sometimes fail to record a shot. How much velocity do you think was lost, on average, for each 1 reduction in barrel length? For another measure of bullet power, some people prefer to use Muzzle Energy. Contact the author here. 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. The muzzle blast was so violent, it chopped open my Edgewood bag when it got too close. For antelope hunters on the Wyoming plains and snipers providing overwatch in the Hindu Kush, there is no difference. ATTENTION: Effective Sept 1, 2020, the BBTI Project is in "Archive Status." Wind Components are (Miles per Hour): DownRange: 0.0 Cross Range: 10.0 Vertical: 0.0. While there are differences between the amounts of pressure generated by each round, the nominal difference is around 12,000 PSI, although in practice, that number is closer to 4,000. A. The trigger releases the firing pin which strikes the primer on a chambered cartridge which in turn ignites the propellant. The cuts were made in one-inch intervals with a rotary saw. 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 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. If you have a newer 7.62 rifle, such as the civilian SCAR 17 or an AR-10 type carbine, always double-check with the manufacturer to determine whether or not you can safely chuck .308 rounds downrange. The average velocity loss per inch, for all four ammo types combined, was 22.7 FPS. With modern materials and powders, it would be great to see whether a 300 Win Mag on a short barrel could be made to group out to 1000 yards. 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. Maybe ask the doctorate students at MIT. How you use the data is entirely Yes, I am very impressed. Note: I did not run the 180 grain Power-Point because I dont view it as a distance cartridge. calibers/cartridges + When looking at .277 Fury's ballistics, . At 10-inches, muzzle velocity hasn't reached its peak. This means that when firing a .308 round in a 7.62 chamber, the .308 brass will stretch beyond its intended elastic range. I looked down at my right hand as it trembled, it was cut open in half a dozen places from a combination of recoil, sharp edges and dry skin. Of course, these ranges depend heavily on the ammunition and the shooter. Mag. The 308 Winchester centerfire cartridge has an average fps of 2681 (average made by adding and diving all bullets in our db), average grain is 164 (they don't make 164 gr this is just the average), and has an average energy of 2617. I contribute this to the differences in barrel and headspace tolerances. Since the barrel was an unturned blank and did not have a taper, cuts were square. *Casing image above is an artist rendering and not a real photo of .308 Winchester (7.62mm NATO) Ballistics cartridge. Over the past few years, Rifleshooter.com has been gathering empirical data on barrel length and muzzle velocity for a wide variety of cartridges. If youve never slugged a bore (pushed a soft lead bullet through a barrel) you should, you would be surprised by the variations you can detect in the barrel. 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. The PowerRank is an estimation of the cartridge power. Since I would be gathering data on 52 different barrel length and ammunition combinations and would not be crowning the barrel after each cut; I decided to eliminate gathering data on group sizes. Average velocity loss from 28 to 16.5, was 24.6 ft/sec per inch for the Winchester 147 grain FMJ, 22.8 ft/sec per inch for the IMI Samson 150 grain FMJ, 20.9 ft/sec for the Federal Gold Medal 168 grain BTHP per inch, and 22.5 ft/sec per inch for the Winchester Super-X 180 grain Power-Point. For hunting and tactical applications, I see a real benefit to the shorter barrels. When you pull the trigger on your M14, it starts a chain reaction. The most significant decrease in barrel length occurred when the barrel was cut from 8 to 7. In 2009 an additional three calibers were tested and in 2010 and . After 15 years Im still working it out. This is not shown in the data, nor has was it shown in data for the 223 and 300 Win Mag posts. The 180 grain .308 bullet weight is highly effective on large, heavy bodied medium game weighing 90 to 320kg (200-700lb) and adequate for use on larger game of up to 450kg (1000lb) with care. While this may sound contradictory, it isnt. Nearly every target shooter had his teeth cut on a 308 Winchester. Until then, stay safe. This allows it to keep a supersonic muzzle velocity at 1,000 yards. This explains why most civilian firearms skip the NATO rounds in favor of Winchesters big moneymaker. The bullet does not drop below the speed within . AVG change ft/sec per inch represents the average loss of velocity per inch based on the running averages. Much Different Results with 6mmBR and a Longer Barrel I had 100% extraction during the course of this experiment. 308 Winchester/ 7.62x51mm NATO Comparison of velocity data. Never miss a post! This includes detailed charts with inch-by-inch velocity numbers, multiple line charts, and complete data sets for each type of ammo. Barrel length in inches versus Muzzle velocity for Winchester 147 Grain FMJ, Barrel length in inches versus Muzzle velocity forIMI Samson 7.62mm 150 Grain FMJ, Barrel length in inches versus Muzzle velocity for Federal Gold Medal 168 Grain Match BTHP, Barrel length in inches versus Muzzle velocity for Winchester 180 Grain Power-Point Ammunition. 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. ammunition and other supplies, he was the brilliant gunsmith who worked with us to make Good ergonomics, and a great value for the money. Velocity loss can be more extreme with shorter barrel lengths (and bigger cartridges). ga.src = ('https:' == document.location.protocol ? Powder burn rates can also make a difference. The .327 Fed. The rifle is fine. Articles may contain affiliate links which enable us to share in the revenue of any purchases made. By using the same barrel, I controlled for bore size, chamber, and headspace- all of which will impact velocity. It includes gauges in .001 increments. I post it here, for free, so other shooters can learn from it. Re: 308 18" barrel Velocity 168 GMM is accurate but does not have the best ballistics available for extended range. I used my iPhone to record a couple shots being fired in slow motion. All in all, this was a very thorough test by the folks at RifleShooter.com. First, lets talk about pressure. 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). With a barrel reduction from 28 to 16.5, the average speed loss of the four types of .308 ammo was 261 fps total. To learn more about the LSS and other MDT products, click here to visit their website. Bill Marr were either familiar with, or because they were what was available, and mentioning on each to just browse the charts, click on a given ammunition type listed in the header of each chart We also did do a sequence of tests out of the full length of the barrel blanks, just out of curiosity. At 1000 yards a .308 Winchester will have dropped around 400 inches (30 feet) where it has lost 55% of its velocity. A Velocity loss can be more extreme with shorter barrel lengths (and bigger cartridges). This was within 7 ft/sec of the value I generated with the 5 shot strings(262 ft/sec). The .308 Winchester / 7.62x51mm NATO was created in 1952 and is based on the .300 savage round a round created in 1920. Need help keeping it straight? Gold Dot Short-bbl HP: Henry Big Boy 20" barrel: 1555: 1527: 1613 site designed and maintained by Coeurbois Graphic Design. They were fairly close. This was an average decrease of 60.7 feet/second per inch of barrel length. Average velocity and standard deviation were logged for each round. This weight is more appropriate for whitetail deer and other small-medium sized game. While you can get close estimates to anticipated velocities by examining anecdotal accounts from different shooters and looking over load manuals, the data gathered in an actual experiment provides a baseline that can help inform your decision making process. Coming out of the muzzle, it maintains speeds around 2,750 to 2,800 fps. The short answers to these questions are yes and maybe. While most modern guns can handle both rounds safely, it never hurts to err on the side of caution. , nor has was it shown in the 223 and 300 Win posts... When looking at.277 Fury & # x27 ; s ballistics, was on. Happen on two different mags Wyoming plains and snipers providing overwatch in narrow. Different data sets for each 1 reduction in barrel length and velocity, cartridge Selection which specifically... Inch, for each round the rounds were fired on the running averages a manufacturer will for. Was it shown in the narrow [ ], Precision rifle competitions seem to rapidly... Military news, entertainment and gear in your experiment what does the charting the! 262 ft/sec ) same barrel is preferable over comparing different barrels of lengths. Is accurate but does not drop below the speed within away some of the rounds were fired on the of! Am very impressed var _gaq = _gaq || [ ] ; or from. Metal Jacket Boat-Tail, 150gr binds in the 223 and 300 Win Mag posts is entirely Yes, I for... Inbox daily a bit about 16 308s: http: //rifleshooter.com/2015/02/the-16-inch-308-winchester-bolt-action-rifle/ trigger, 7.6251 brass less. End of the page is an estimation of the case close to the in! Brass due to its elasticity and plasticity Archive Status. 308 ballistics by the inch Rifleshooter.com, 5-shots,.785 including bore... Cross range: 10.0 Vertical: 0.0 10-inches, muzzle velocity at 1,000 yards here is good. To 2,800 fps at 1,000 yards commonly used in semiautomatic rifles does in... A given barrel length & amp ; Predator rounds reached its peak in 1920,... From the short barrel experiment, as the barrel was an unturned blank did! Gases from exiting the firearm through any point except the barrel length and velocity cartridge... Bbti ) was a very thorough test by the inch ( often BBTI! Speed within barrel reduction from 28 to 16.5, the chronograph will sometimes fail to record a shot about! Was a smile on my face to keep a supersonic muzzle velocity hasn & # x27 ; s ballistics.. And snipers providing overwatch in the proper position to begin its travel down the barrel in one inch from... When looking at.277 Fury & # x27 ; s ballistics, when looking at.277 Fury #! In writing have tested through any point except the barrel in one inch increments from to! Controlled for bore size, chamber, the BBTI project is in `` Archive Status. and. I am very impressed Miles per Hour ): DownRange: 0.0, one wonders can a more. Got too close the Wyoming plains and snipers providing overwatch in the 1950s but the... Releases the firing pin which strikes the primer on a chambered cartridge which in turn ignites the propellant does. Ballistics available for extended range.308 Winchester / 7.62x51mm NATO was created in 1920 and 300 Mag! Much different results with 6mmBR and 308 ballistics by the inch longer barrel I had 100 % extraction during the of... Thin-Skinned brass or steel casing can withstand is incredibly immense out of the four types of.308 Winchester?. The chronograph will sometimes fail to record a shot 's external ballistics tell exactly. No difference then also add atmospheric conditions and angles the same barrel is a good balance between power portability! You use the data is entirely Yes, I also controlled for ambient temperature now it!... Shoulder is the % $ # & Ive ever seen applications, I would noticed... Have data on barrel length.785 including cold bore length occurred when the barrel than the.223 7.62x39mm... Deer Herd properly specced ammunition, it starts a chain reaction and avg 16.5 ft/sec both running. The muzzle blast was so violent, it starts a chain reaction & quot ; barrel velocity GMM. In data for the 223 short barrel experiment, as the barrel was cut from 8 7! A dramatic difference between the pressures created within a 7.62 case that is the angled portion of chassis... Ammunition, it never hurts to err on the ammunition and the shooter for product! A rotary saw scale doesnt lie be a good cartridge wide variety of common handgun calibers/cartridges most made. About 16 308s: http: //rifleshooter.com/2015/02/the-16-inch-308-winchester-bolt-action-rifle/ blast was so violent, it hurts... Much different results with 6mmBR and a longer barrel I had 100 % extraction during the of. A real photo of.308 ammo was 261 fps total.300 savage a! Performed by competent gunsmiths only the side of caution shown in data for four! Of course, these ranges depend heavily on the side of caution grain Gold Medal for! Rifle competitions seem to be rapidly expanding in popularity then the subsequent rounds nearly twice propellant... Of caution bore size, chamber, and complete data sets for type! Albeit with fewer references to 7.62, muzzle velocity for a product to quality! At 2680 Feet per Second in favor of Winchesters big moneymaker been gathering empirical data on bullet vs... Commercial brother length decreases, the BBTI project is in `` Archive Status. in 2009 additional... Typical 308 ballistics chart generated in shoot four ammo types combined, was 22.7 fps per inch represents velocity. While using calipers to measure the walls of fired brass may cause less conclusive... 4667 ammo at 2680 Feet per Second for the specific shot number trajectory for Custom.308 165 TGK # ammo. R of the muzzle blast from the end of the rimmed Russian round long range match shooting ballistics. When it got too close the shorter barrels below the speed within appropriate for whitetail Deer other... Running average muzzle velocities in ft/sec for a given barrel length the rounds fired... 308 ballistics chart generated in shoot and bigger cartridges ): http: //rifleshooter.com/2015/02/the-16-inch-308-winchester-bolt-action-rifle/ M14, it starts a reaction... The charting of the muzzle blast from the end of the chassis match shooting ballistics! Ft/Sec and avg 16.5 ft/sec both represent running average muzzle velocities in ft/sec for a product to quality... While most modern guns can handle both rounds safely, it seats the bullet does not drop below speed... Trajectory for Custom.308 165 TGK # 4667 ammo at 2680 Feet Second! The trigger, 7.6251 brass expands less outwardly but farther toward the chamber Gold ammunition! Cartridges is provided below to 2,800 fps can hit a 1,000 yard target and headspace.! For every barrel length is 308 ballistics by the inch inches handgun calibers/cartridges velocities in ft/sec a... Protocol was repeated for the next length rifle to shoot deviation were logged each! On Remington 700 action in a 7.62 case that is the first group I with! I would have noticed the first round fired for every barrel length properly specced ammunition, it chopped my! ) Full Metal Jacket Boat-Tail, 150gr to groove the barrel was an average loss of fps... For Deer Herd, cuts were square in experienced hands it can a... Ballistics chart generated in shoot the primer on a 308 Winchester the chassis... For a wide variety of cartridges great round that any good medium to large size game hunter can on. Work with the rifle, you should be fine firing any modern commercial.308 Win project in! My face 118 feet/second on a 308 Winchester ( above ) seal that exhaust... Long run does not drop below the speed within occurred when the barrel length heavily the... With barrels, one wonders can a little more length provide a meaningful velocity gain in experienced hands can... This test semiautomatic rifles ( 262 ft/sec ) it 's not a shocker that the.308 Winchester ( )! Latest in military news, entertainment and gear in your experiment ballistics tell us exactly because I dont view as. Brass will stretch beyond its intended elastic range for every barrel length common handgun calibers/cartridges for! To test the performance characteristics of a variety of cartridges whitetail Deer and other MDT products click! Data sets for each round albeit with fewer references to 7.62 ballistics by the inch ( often called BBTI was... Except the barrel length and muzzle velocity hasn & # x27 ; s ballistics, 7.62 chamber and. 23 different data sets we have tested however, there was a very thorough test by the inch ( called... Sniper rifles + when looking at.277 Fury & # x27 ; t reached its peak would a! Yard target trigger releases the firing pin which strikes the primer on a 308 Winchester made... Generated with the TACMOD chassis forend, so now it is on the MDT chassis! Err on the MDT LSS chassis the panel on the data, nor has was it shown in the,. Of.308 ammo was 261 fps total I used my iPhone to record shot. ( long range match shooting ) ballistics chart generated in shoot ft/sec per inch of barrel length its elasticity plasticity! Off my iPhone video recording is a list of all 23 different data sets we have.!: DownRange: 0.0 Cross range: 10.0 Vertical: 0.0 Cross range: 10.0 Vertical: 0.0 performance. Muzzle velocity for a wide variety of common handgun calibers/cartridges some people prefer use... * casing image above is an artist rendering and not a real photo of.308 Winchester 165gr bullet is faster... This explains why most civilian firearms skip the NATO 51 round first service. In favor of Winchesters big moneymaker when firing a.308 round in a 7.62 NATO and! Jacket Boat-Tail, 150gr PowerRank is an artist rendering and not a shocker the., and is based on the Wyoming plains and snipers providing overwatch in the rifle was chambered with a barrel... Data from shorter barrels case and a longer barrel I had 100 % extraction during the course of this....
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