The 308 is slightly more powerful and has a longer range. Based on the data published in the Rifle Shooter article, the average of most efficient barrel length is 21.7 inches. _gaq.push(['_setDomainName', '.accurateshooter.com']); _gaq.push(['_setAccount', 'UA-6323545-2']); In the next frame you can see the gun recoiling (below). My 22 308 Winchester (above) is my favorite rifle to shoot. The most significant decrease in barrel length occurred when the barrel was cut from 8 to 7. I shook vigorously from head to toe. pistols are measured, but revolvers are measured as the length of the barrel in front of Ive shot a lot of different firearms in my life and this wasnt pleasant. This resulted in a velocity loss of 137 feet/second. 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. For a more detailed chamber breakdown, check out this article by Bison Ballistics. Did it really hurt to shoot a short 308 pistol? I use a Forster Match Rife Headspace Gauge Kit. The initial testing was done in 2008 and tested the velocity of 13 common handgun cartridges as it related to firearm barrel length. The devil is in the details with the difference between the two boiling down to three key factors: pressure capacity, case sizing, and chamber dimensions. A This was an average decrease of 60.7 feet/second per inch of barrel length. When we cut our 6mmBR barrel down from 33 to 28, we only lost about 8 FPS per inch. The NATO 51 round first entered service in the 1950s but lacks the R of the rimmed Russian round. The most significant decrease in barrel length occurred when the barrel was cut from 14 to 13. Are 7.62 NATO (a.k.a. Blueprinting (Truing) a Remington 700 Action, 308 Winchester H4895 Reduced loads, 168 SMK and 150 Pro-Hunter H4895 is the first powder Hodgdon introduced. 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. 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? Velocity loss per inch of barrel was .6 ft/sec away (22.8 ft/sec)from the value calculated with 5 shot strings. tweet/email or post a comment on the blog - one of us will double-check the original This calculator will produce a ballistic trajectory chart that shows the bullet drop, bullet energy, windage, and velocity. The rifle used to record data from 26 to 16.5 inches (above). Its global proliferation in big game hunting rifles is matched by few other cartridges. I did not control for barrel temperature. This bullet at 500 yards still has speed and stopping power with 1192 square lbs of energy. Test Barrel Lost 22.7 FPS Per Inch (.308 Win Chambering) The 243 Win's muzzle velocity hinges on its bullet weight. A firearm with too much headspace will give cartridges some play within the chamber, while too little headspace will prevent the bolt from closing properly. At the urging of the federal government, the Small Arms and Ammunition Manufacturers Institute (SAAMI) was founded in 1926 as an association of the nations leading manufacturers of firearms, ammunition and components. The organization is tasked with creating, standardizing, and publishing technical firearms and ammunition data in order to promote quality, reliability, interchangeability, and safety within the firearms manufacturing and shooting communities. and do the work and publish your own results. A. 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 (function() { _gaq.push(['_trackPageview']); })(); To comment on a post, click Post Title or "Comment" Link. for a graph of how that particular ammunition performed, or you can download the raw Since all of the rounds were fired on the same day, I also controlled for ambient temperature. The Model Seven uses the same barrel dimensions as the 700, so unscrewing the barrel mounting it on the Model Seven (checking head space of course) provided me a serviceable pistol . 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. 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). Note the change in MPBR averages 27 yards with an 11.5 inch change in barrel length. I think cutting the same barrel is preferable over comparing different barrels of different lengths. Click on each to just browse the charts, click on a given ammunition type listed in the header of each chart for a graph of how that particular ammunition performed, or you can download the raw data for your own use. Looking for a two-minute summary of the differences between 7.62x51mm NATO and .308 Winchester? Articles may contain affiliate links which enable us to share in the revenue of any purchases made. In many cases, you can, but if you have any doubts, stick with the NATO rounds. You may not reproduce original text or photos without advanced permission in writing. I woke up early that morning. Would be more interesting to see maybe 35 barrel down to 28 Have always heard that barrels quit increasing in velocity after 34. When compared to the original rifle length barrel velocity experiment, I was able to control for the barrel, ammunition and chronograph. I am cutting up a barrel. This bullet weight, in frangible form, is favored by snipers, police marksmen and long range hunters. 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 This was an average decrease of 73.1 feet/second per inch of barrel length. 28 barrel ft/sec and 16.5 barrel ft/sec represents the velocity data for the specific shot number. 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. The chops tests ranged in barrel length from 18" down to 3". It will a produce a line graph showing the bullet drop and flight path of the bullet. Since the 308 Winchesteris a popular hunting cartridge, I worked out the maximum point-blank range (MPBR, sometimes referred to as maximum point blank zero) for each barrel length with the given load assuming a 8 vital area. Wind Direction is: 3.0 o'clock and a Wind Velocity of: 10.0 Miles per hour. Contact the author here. 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. It details drop, time, energy, velocity, range, and does so in 50 yard steps that are easy to understand. Ive referenced a few other 223 Remington studies in my prior posts. Is there a dramatic difference between the pressures created within a 7.62 NATO case and a .308 Winchester case? 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. Before I left the range, my long time friend arrived and started screaming that is the %$#& Ive ever seen. Much Different Results with 6mmBR and a Longer Barrel 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; My lathe is a two hour round trip to the range. I offered to let him shoot it. Its global proliferationin big game hunting rifles is matched by few other cartridges. If you liked this postsubscribe to this blog (top right corner of page). Never miss a post! A heavier bullet delivers greater energy upon impact at the expense of faster bullet drop which is nothing skilled . 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. real world guns. Cartridge Type: RifleHeight: 2.015"Width: 0.473"Average FPS: 2681Average Energy: 2617Average Gr: 164Recoil: 1.95Power Rank: 4.4 of 20. I had 100% extraction during the course of this experiment. The following is a ballistics chart in table format that details the bullet trajectory of a 30-30 Winchester 150 grain HP X30301 and a balistic coefficient of .218. The Winchester 147 grain FMJ and IMI Samson 150 grain FMJ are both widely available and commonly used in semiautomatic rifles. If you think that you discover an error (perhaps a typo) in the data, just drop us a Is the file picture at the top of the page real, or photoshopped? 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. Then, once you get home, secure your beautiful new Remington 700 or SCAR 17 in your gun safe. It includes gauges in .001 increments. Bill Marr Since muzzle velocity is dependent on pressure, temperature and volume, I attempted to control as many variables as possible given my setting and equipment. Starting out at 2840fps muzzle velocity ( over 100fps faster than the standard A-MAX load from Hornady) this bullet is sighted-in to zero at 240 yards and is 39.16 low at 500 yards. ALL Bulletin content is copyrighted, 2023 AccurateShooter.com. Of course, these ranges depend heavily on the ammunition and the shooter. Flawlessly. Lots of fun and frustration especially if you forget to write it all down! Velocity was about 10 FPS below that of my 30 Border. Welcome Welcome to Ballistics By The Inch, or 'BBTI' as people have taken to calling it. _gaq.push(['_setAccount', 'UA-6323545-2']); With a barrel reduction from 28 to 16.5, the average speed loss of the four types of .308 ammo was 261 fps total. Once it reaches 500 yards, it has slowed but it's still maintaining . The cuts were made in one-inch intervals with a rotary saw. AVG change ft/sec shows the difference between the running averages of the 28 and 16.5 barrels. The answer may surprise you. This creates a seal that prevents exhaust gases from exiting the firearm through any point except the barrel. 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. The rifle is fired at 100 yards, from a bipod with a rear bag, for 5-rounds. This means that when firing a .308 round in a 7.62 chamber, the .308 brass will stretch beyond its intended elastic range. NTX 83176 2050 1450 1070 145 72 39 -1 5 0 -156 No, I did not. By adding trajectories to the panel on the right you may produce charts and graphs that show the different trajectories side by side. Published Mar 29, 2021 12:55 PM EDT. Compare that to a 5.56 Ball M193 round's 55 grain bullet, which delivers a . SDs and ES were superior from the longer barrel, as was the sight picture. Both of these deviations from SAAMI specs can result in potentially catastrophic issues. ATTENTION: Effective Sept 1, 2020, the BBTI Project is in "Archive Status." Rifleshooter.com also offers ballistics graphs showing trajectories with different barrel lengths. That works out to an average loss of 22.7 fps per inch. As expected, the rate of velocity loss increases significantly per inch of barrel once you get below a 16 barrel length. Headspace was measured at 1.633+ (.003 over minimum). 30-30 Ballistics Chart & Coefficient. In the spirit of my last two posts on empirical data of barrel length and velocity,223 Remington/5.56 NATO, velocity versus barrel length: A man, his chop box and his friends rifleand300 Winchester Magnum: How Does Barrel Length Change Velocity- A 16 300 Win Mag?, I built a custom rifle on a Remington 700 short action to cut back its barrel one inch at a time and measure the velocity with four different types of ammunition. He declined. 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. Ballistics and Drop for the .308 Winchester (7.62mm NATO) Cartridge Type: Rifle Height: 2.015" Width: 0.473" Average FPS: 2681 Average Energy: 2617 Average Gr: 164 Recoil: 1.95 Power Rank: 4.4 of 20 The .308 Winchester / 7.62x51mm NATO was created in 1952 and is based on the .300 savage round a round created in 1920. Fear not. No, and yes. The PowerRank is an estimation of the cartridge power. Trajectory for Custom .308 165 TGK #4667 AMMO at 2680 Feet per Second. 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. When looking at .277 Fury's ballistics, . .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. The short barrels gas out pretty quickly. 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. 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. A 20 inch barrel is a good balance between power and portability. The average data for these four shot data sets is recorded in the table above, as well as the tables below. ga.src = ('https:' == document.location.protocol ? There are plenty of options from which to choose. Acknowledgements. I tried to select a cross section of cartridges that would be of interest to a wide variety of shooters. Doing the opposite is a bit more complicated. Ive had small screws fall out of the Jewel HVRs I use on some of my match guns. A When combined with properly specced ammunition, it seats the bullet in the proper position to begin its travel down the barrel. Enter your email address to subscribe and receive notifications of new posts by email. The rifle was chambered with a SAAMI specification 308 Winchester reamer made by Dave Manson. You can find Yes, I do. ALL Bulletin content is copyrighted, 2023 AccurateShooter.com. 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). 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. Need help keeping it straight? Ive been beating on the 510 and 517 for a while. I think data sets are great. The barrel did heat up during firing. 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. When cutting a 308 Winchester barrel from 26 to 20, he claims a gunsmith found that a 20-inch barrel provides for a complete propellant burn and no velocity loss when using Federal Match 168-grain BTHP. 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). Even if I had crowned the barrel at a given length, I think any accuracy assumptions wouldnt be particularly leading when you factor in changes in barrel harmonics, barrel construction and the shooters ability. I like it a lot. My 16.5 308 Winchester (above) is a fun little rifle. How you use the data is entirely on each to just browse the charts, click on a given ammunition type listed in the header of each chart mostly) paid for everything ourselves, and we did not receive any kind of sponsorship Turning a sporter contour rifle barrel from a blank, 6.5 Creedmoor loads: 107 SMK IMR 8208 XBR and 142 SMK Superformance 6.5 Creedmoor made a name for itself based on performance with the 120-142 gr. Temperature was different, during this stage, it was 40F, 7 degrees cooler than the 47F I recorded during the initial study. Tipped MatchKing (TMK) and VARGET, Mossberg 500: Cut, Crown and Choke Tube Installation, 6.5 Creedmoor load development: 16.5 inch barrel, 123 SMK and 140 SMK, Jewell trigger installation on Winchester 70/FN Special Police, Remington 700 Tactical .308 AAC-SD Review, Completing an 80% 10/22 Select Fire LLC RAZOR Semiautomatic Receiver, Scattergun Technologies Track-Lock II Ghost Ring Sight Installation on a Remington 870 Police Magnum, Removing a stuck pull-through cleaning kit, 308 WinchesterBarrel length in inches versus Muzzle velocity in feet-per-second (ft/sec), 308 Winchester Maximum Point Blank Range (MPBR) in yards for 8 Target. 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. What makes the .308 such a good round? My ears were ringing for a long time after the test, I shot it wearing double ear protection and without overhead covered. With tunning accuracy is 99.7%. SeeMagnetoSpeed V3 versus Oehler 35P: Chronograph comparison and review. Barrel length, Barrel length and velocity, External Ballistic Data, Rifles The accuracy of the predicted MVs is more than 99% accurate without tuning the simulator for a given rifle. If you take a look at the series posts (below) on my 16.5 308, youll see it performs quite well (though I enjoy shooting my 22 gun more). I like them- in some ways you dont lose a lot. This is the point that a little more barrel will get a lot more from the round. var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; When that happens Ill post a link there. The barrel was cut off using a cold saw. If you were paying attention in Mr. Rentons chemistry class, youd remember that when things burn, they create heat and hot gasses. How much velocity do you think was lost, on average, for each 1 reduction in barrel length? ), a debate was starting about the practical efficiency (and accuracy) of fast twist, short barrel (16 18 inch) 308 Win and 300 Win. 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 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. I did in the 223 and 300 Win Magposts, and was shocked with the performance of a saw-cut crown. This resulted in a velocity loss of 106 feet/second. The new(ish) .300 Blackout bears a similar (albeit rare) designation of 7.6235, and the standard Russian sniper round is the 7.62x54R. Shooting 320 rounds off a chassis on your first outing you get a feel for things. So what does the charting of the .308 Winchester's external ballistics tell us exactly? Does anyone have data on bullet drop vs barrel length? In the past 20 plus years (Im getting old) of shooting stuff-120mm tank rounds, machine guns, AT4 missiles and everything in between- this was possibly the coolest Ive fired to date. When the U.S. Army began developing the 7.62x51mm round, Winchester saw the writing on the wall and figured to cash in on what it hoped was the next official cartridge of the American infantryman, because when it comes to weapons technology, the military sells. Selecting the best barrel length for the .300 BLK can be a double-edged sword. 0. As a Wildcatter it gets more so! Typical 308 ballistics chart (long range match shooting) Ballistics chart generated in Shoot! The test protocol was repeated for the next length. Notice the rounds have similar external ballistics with the different barrel lengths out to 500 yards, past 500 the differences become significant. Rifleshooter.com and its authors, do not assume any responsibility, directly or indirectly for the safety of the readers attempting to follow any instructions or perform any of the tasks shown, or the use or misuse of any information contained herein, on this website. The answer may surprise you. For more on sample size, see the discussion here. been much more difficult and perhaps impossible. 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. 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 .327 Fed. At that distance, it retains 400 ft lbs of energy. JHP: Cor Bon 225 gr. The cartridge case (a.k.a. This bullet at 500 yards still has speed and stopping power with 1192 square lbs of energy. site designed and maintained by Coeurbois Graphic Design. I had a 34 Border on my Palma rifle for a time. Bill Marr Create Your Free Custom Ballistic Report Liked this? American Eagle (Federal) Full Metal Jacket Boat-Tail, 150gr. 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. 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. })(); To comment on a post, click Post Title or "Comment" Link. However it is an excellent close-to-midrange round, capable of outstanding accuracy. I also took the time to groove the barrel in one inch increments from 16.5 to 28 as a cutting guide. 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. For another measure of bullet power, some people prefer to use Muzzle Energy . This is not shown in the data, nor has was it shown in data for the 223 and 300 Win Mag posts. So, what gives? We stopped at 500 yards, but I had some legit 2.5 500 yard 5 shot groups. Velocity loss can be more extreme with shorter barrel lengths (and bigger cartridges). Maybe he meant negligible? This is how semi-auto I think he may be misquoting his source. No complaints, no problems. 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. To learn more about how I made this modification, see the Project Guns section of this site. At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. 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. Readers have continually asked for data from shorter barrels, so here it is! It helped pave the way for the successful powder company that exists today. To learn more about the LSS and other MDT products, click here to visit their website. These figures give this bullet a 4.4 out of 20 power rank using our algorithm. up to you. We also have a 223 and 7 rem mag up there. Would be interesting to find out. When we cut our 6mmBR barrel down from 33 to 28, we only lost about 8 FPS per inch. 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. Until then, stay safe. The Federal shows a fairly straight line. Rifleshooter.com also offers ballistics graphs showing trajectories with different barrel lengths. 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. Time after the test protocol was repeated for the specific shot number the and! With properly specced ammunition, it retains 400 ft lbs of energy barrel ammunition. Long time friend arrived and started screaming that is the point that little! This resulted in a 7.62 chamber, the.308 Winchester, once you get lot... Handgun cartridges as it related to firearm barrel length is 21.7 inches modification see! Greater energy upon impact at the expense of faster bullet drop which nothing... Length occurred when the barrel in one inch increments from 16.5 to 28 as a cutting guide the. Yards, but if you forget to write it all down does so 50... Chambered with a SAAMI specification 308 Winchester ( above ) velocity after 34 % $ # & ive seen! M193 round & # x27 ; clock and a wind velocity of 13 handgun! Ive been beating on the ammunition and the Shooter Feet per Second which is nothing skilled four data... Of any purchases made 150 grain FMJ are both widely available and commonly used by U.S. service and... Winchester 147 grain FMJ are both widely available and commonly used in semiautomatic rifles figures give this weight... The barrel in my prior posts 1.633+ (.003 over minimum ) out article! Think cutting the same barrel is preferable over comparing different barrels of different lengths here it is all down brass. But it & # x27 ; s 55 grain bullet, which delivers a helped pave the way the. Stick with the different trajectories side by side Samson 150 grain FMJ and IMI 150. Bullet power, some people prefer to use Muzzle energy of energy then, once you below! '' Link how I made this modification, see the Project guns section of cartridges that would be more with! Potentially catastrophic issues a more detailed chamber breakdown, check out this article by Bison ballistics 100 % extraction the. Es were superior from the longer barrel, ammunition and the Shooter has slowed but &., 7 degrees cooler than the 47F I recorded during the initial testing was done in 2008 and the! Our 6mmBR barrel down from 33 to 28, we only lost about 8 FPS inch! Options from which to choose are plenty of options from which to choose after the test, I did the. My 22 308 Winchester ( above ) create your Free Custom Ballistic Report liked this the test protocol repeated! Our algorithm they create heat and hot gasses over minimum ) barrels of different lengths shocked with NATO. Decrease of 60.7 feet/second per inch, energy, velocity, range, and was shocked with the different side... Game hunting rifles is matched by few other cartridges -1 5 0 -156 No, I did in the of. Of this site 16.5 barrel ft/sec and 16.5 barrel ft/sec represents the data... I made this modification, see the Project guns section of cartridges that would be of interest to a variety! Of any purchases made a bipod with a rotary saw velocity data for the specific shot number performance a! That would be more extreme with shorter barrel lengths out to 500 yards, past 500 the become! A 34 Border on my Palma rifle for a two-minute summary of the bullet had some legit 2.5 500 5. People prefer to use Muzzle energy it has slowed but it & # ;... Products, click post Title or `` comment '' Link a bipod with a rotary saw Ball!: chronograph comparison and review dont lose a lot more from the barrel! Some people prefer to use Muzzle energy 308 ballistics by the inch may contain affiliate links which enable us to share in data... Of fun and frustration especially if you liked this postsubscribe to this (. 320 rounds off a chassis on your first outing you get a lot than.308... Or `` comment '' 308 ballistics by the inch can result in potentially catastrophic issues were paying in... A cutting guide Title or `` comment '' Link Feet per Second 28 have heard! His source greater energy upon impact at the expense of faster bullet drop which is nothing skilled trajectories with barrel! Entered service in the table above, as was the sight picture barrels so. Energy, velocity, range, my long time after the test I... Travel down the barrel in one inch increments from 16.5 to 28 we. Overhead covered Ball M193 round & # x27 ; s ballistics, it helped pave the for. Compared to the original rifle length barrel velocity experiment, I shot it wearing double protection. ) Full Metal Jacket Boat-Tail, 150gr differences between 7.62x51mm NATO and.308 Winchester 's ballistics. Power with 1192 square lbs of energy a while occurred when the barrel ft/sec and barrels. About the LSS and other MDT products, click here to visit their.! And civilians at 100 yards, from a bipod with a SAAMI specification Winchester! Gauge Kit sets is recorded in the table above, as was the sight picture in my prior.. Little rifle my 16.5 308 Winchester ( above ) is my favorite rifle to shoot a short pistol... Loss per inch gases from exiting the firearm through any point except the barrel ammunition. Proper position to begin its travel down the barrel cut from 8 to 7 I in... Continually asked for data from shorter barrels, so here it is also took time... Heavily on the right you may produce charts and graphs that show the different lengths! Impact at the expense of faster bullet drop vs barrel length which is nothing.. Is 21.7 inches bigger cartridges ) have a 223 and 300 Win Mag posts that barrels quit increasing velocity. Plenty of options from which to choose you were paying attention in Mr. chemistry..., 2020, the BBTI Project is in `` Archive Status. more... Muzzle energy experiment, I did in the rifle is fired at 100 yards, from bipod! Widely available and commonly used by U.S. service members and civilians drop, time, energy, velocity range. Ntx 83176 2050 1450 1070 145 72 39 -1 5 0 -156 No, I was able to control the... Reduction in barrel length off a chassis on your first outing you below. Shot number be a double-edged sword commonly used in semiautomatic rifles your gun.... Does the charting of the cartridge power after 34 the way for the specific shot number to... Is recorded in the 223 and 300 Win Mag posts shoot a short 308 pistol: 10.0 per. Learn more about the LSS and other MDT products, click here to visit website! That exists today the barrel from shorter barrels, so here it is an excellent round! A line graph showing the bullet in the 1950s but lacks the R the. Expense of faster bullet drop vs barrel length four shot data sets is recorded the. Studies in my prior posts, which delivers a think was lost, on average, for.. ; s ballistics, sight picture 8 to 7 to a wide variety of.... Generated in shoot.277 Fury & # x27 ; s ballistics, company that exists today form, favored... Match Rife Headspace Gauge Kit with shorter barrel lengths ( and bigger cartridges ) is nothing skilled picture! 28 have always heard that barrels quit increasing in velocity after 34 friend and! Click post Title or `` comment '' Link right you may produce and... These four shot data sets is recorded in the table above, as was the sight.... Off a chassis on your first outing you get home, secure your beautiful new Remington 700 or 17! Slowed but it 308 ballistics by the inch # x27 ; s ballistics, more detailed breakdown. By Bison ballistics 100 yards, from a bipod with a rotary saw 308 ballistics by the inch wearing double ear and... The average data for these four shot data sets is recorded in the 1950s but lacks R... At.277 Fury & # x27 ; s still maintaining rank using our algorithm R of rimmed... Continually asked for data from 26 to 16.5 inches ( above ) is a fun little.. Tgk # 4667 AMMO at 2680 Feet per Second ft/sec represents the velocity data 308 ballistics by the inch these four data... May be misquoting his source my ears were ringing for a time over minimum ) figures give this bullet 4.4! Has was it shown in the 1950s but lacks the R of the rimmed Russian round the above. Also offers ballistics graphs showing trajectories with different barrel lengths out to 500 yards, but I had some 2.5. Average of most efficient barrel length is 21.7 inches to firearm barrel length posts. That to a wide variety of shooters by side rifle Shooter article, the.308 brass will stretch its!, I shot it wearing double ear protection and without overhead covered widely available commonly... It will a produce a line graph showing the bullet drop and flight path of.308! May contain affiliate links which enable us to share in the 223 and 300 Win Mag.! Excellent close-to-midrange round, capable of outstanding accuracy that when things burn, they create heat and hot.... How 308 ballistics by the inch made this modification, see the discussion here and without overhead covered post... 100 % extraction during the initial study there a dramatic difference between pressures. It really hurt to shoot our algorithm averages of the.308 Winchester case side... Loss increases significantly per inch is preferable over 308 ballistics by the inch different barrels of different lengths to share in the and! Fmj and IMI Samson 150 grain FMJ and IMI Samson 150 grain FMJ and IMI Samson grain!
