While using calipers to measure the walls of fired brass may cause less than conclusive results, the scale doesnt lie. While this may sound contradictory, it isnt. 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. Registration on or use of this site constitutes acceptance of our Terms of Service. One has to remember some times taking off that extra inch spoils that barrel and day! Effect of Barrel Length on the Muzzle Velocity and Reportfrom a Mosin-Nagant 7.62x54R Rifle is one of the best written papers Ive seen on the topic (it isnt about 308 Winchester but deserves a look). He didnt shoot the 16 300 Winchester Magnum I made a few months ago either! was measured from the end of the barrel back to the breech face. 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. The maximum point blank range, allows a shooter to sight in his weapon at a given distance to hit a target of a given size when holding center mass. Ive referenced a few other 223 Remington studies in my prior posts. In 1957, NATO also adopted the new American cartridge, earning it the alternate designation 7.62 NATO. That same year, U.S. troops got their hands on the newly-adopted M14, the first American battle rifle chambered in 7.62x51mm. As a Wildcatter it gets more so! To make the test even more interesting, four different types of .308 Win factory ammunition were chronographed at each barrel length. At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. Is the file picture at the top of the page real, or photoshopped? 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. This includes detailed charts with inch-by-inch velocity numbers, multiple line charts, and complete data sets for each type of ammo. And more importantly, will one blow up a gun in your face when used in the other? Mag. 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 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. Yes, it did. _gaq.push(['_setDomainName', '.accurateshooter.com']); 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 The .308 Winchester / 7.62x51mm NATO was created in 1952 and is based on the .300 savage round a round created in 1920. 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. _gaq.push(['_setAccount', 'UA-6323545-2']); Yes, I do. No, I did not. 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. 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. No guessing, no models, no arbitrary numbers. rifle, you should be fine firing any modern commercial .308 Win. This includes detailed charts with inch-by-inch velocity numbers, multiple line charts, and complete data sets for each type of ammo. For more on sample size, see the discussion here. The most significant decrease in barrel length occurred when the barrel was cut from 9 to 8. Your data showed the 7.6239 mm Russian slowed down from 23 to 24 in barrel length. Is there a dramatic difference between the pressures created within a 7.62 NATO case and a .308 Winchester case? The IMI 150 grain FMJ 7.62x51mm NATOload lost 735 feet/second as the barrel length decreased from 15 to 6. 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. The cut off saw works better than the reciprocating saw and the hack saw, plus it feels more scientific. The test protocol was repeated for the next length. With a barrel reduction from 28 to 16.5, the average speed loss of the four types of .308 ammo was 261 fps total. The bottom picture is the first group I shot with the rifle, 5-shots, .785 including cold bore. Would be interesting to find out. were either familiar with, or because they were what was available, and mentioning This calculator will produce a ballistic trajectory chart that shows the bullet drop, bullet energy, windage, and velocity. .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. Compare that to a 5.56 Ball M193 round's 55 grain bullet, which delivers a . The .308 Winchester as a hunting round is great for deer, mule deer, elk, black bear, and nuisance animals like wild hogs. What do you think of the MDT LSS chassis? I offered to let him shoot it. The 7.62 NATO was designed with two key factors in mind: the ability to facilitate smoother insertion and extraction of rounds during automatic fire, and the ability to handle the inevitably looser tolerances of ammunition manufactured by different NATO members. So what does the charting of the .308 Winchester's external ballistics tell us exactly? Powder burn rates can also make a difference. At each cut length, velocity was measured with a Magnetospeed chronograph. The heavier weight and newer designed 175gr Sierra . 300 Winchester Magnum: How Does Barrel Length Change Velocity- A 16 300 Win Mag? Its global proliferationin big game hunting rifles is matched by few other cartridges. JHP: Cor Bon 225 gr. If you liked this postsubscribe to this blog (top right corner of page). At that distance, it retains 400 ft lbs of energy. Here is a list of all 23 different data sets we have tested. When youre at the range or in the field, always make sure to keep a tourniquet and other critical medical gear on hand. tweet/email or post a comment on the blog - one of us will double-check the original A. Note the change in MPBR averages 27 yards with an 11.5 inch change in barrel length. I think he may be misquoting his source. 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). IMI 150 grain FMJ 7.62x51m NATO data was gathered down to a 6 barrel length. You can find 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). 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. For example in this chart I lowered the velocity to . Maybe ask the doctorate students at MIT. _gaq.push(['_setDomainName', '.accurateshooter.com']); Nearly every target shooter had his teeth cut on a 308 Winchester. Published Mar 29, 2021 12:55 PM EDT. (More powder and more pressure). Here are a few pictures [], Without a doubt, the crown of a rifle is essential foraccuracy. I am cutting up a barrel. All 7.6251 rounds are cool for use in the proper NATO weapon, but 7.62x39 is the original caliber of the infamous AK-47. The small sample size is always an issue. In fact the .308 Winchester 165gr bullet is traveling faster at 1000 yards than the .223 or 7.62x39mm at just 500 yds. pistols are measured, but revolvers are measured as the length of the barrel in front of Since we first launched BBTI in November of 2008, it has become a primary reference tool for firearms enthusiasts of all stripes and from around the globe. Ive been beating on the 510 and 517 for a while. Thank you. 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. Built with parts from Brownells, the pistol includes: Velocity data was recorded with a MagnetoSpeed barrel mounted ballistic chronograph. Skip to main content; Skip to secondary menu; Skip to primary sidebar; . 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 latter has nearly twice the propellant, and is therefore better able to fell very distant game. .308 Winchester (7.62mm NATO), It's fine to 600-800 yards and is fine at that range out of an 18" barrel. Interestingly, these numbers jive pretty well with estimates found in reloading manuals. The PowerRank is an estimation of the cartridge power. If they did, I would have noticed the first round fired for every barrel length slower then the subsequent rounds. | Never miss a post! Coming out of the muzzle, it maintains speeds around 2,750 to 2,800 fps. Like the 5.56 versus .223 comparison, understanding the differences between 7.6251 NATO and .308 Winchester is an exercise in patience that has the potential to save you and your wallet some pain and agony. 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. 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. Without his help all of this would have Drop (Inch) / 0-3.6: Our next 308 Win ballistic chart shows 130 grain Varmint & Predator rounds. In experienced hands it can hit a 1,000 yard target. As an all around work horse for sniping that works great for both Law Enforcement and military sniping, the .308 is hard to beat. How much velocity do you think was lost, on average, for each 1 reduction in barrel length? 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. Your choice. It fires a .312-inch-diameter bullet as opposed to a .308-inch-diameter bullet and operates at 45,000 psi as opposed to 40,000. 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. Compare the above rates of loss to those found in308 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 and the Winchester 180 grain Power-Point 22.5 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 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. site designed and maintained by Coeurbois Graphic Design. Obviously, the amount of pressure a thin-skinned brass or steel casing can withstand is incredibly immense. var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); Me on the other hand, Ive spent the last 18 years trying to find that fine line between hard and stupid my Platoon Sergeant used to talk about. Test Barrel Lost 22.7 FPS Per Inch (.308 Win Chambering) 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. I may wear a lab coat to kick things up another notch next time. CLICK HERE to Read the Rifleshooter.com Test. Enter your email address to subscribe and receive notifications of new posts by email. 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 . Red Oak, White, or Chestnut for Deer Herd? Never miss a post! Gold Dot Short-bbl HP: Henry Big Boy 20" barrel: 1555: 1527: 1613 After 15 years Im still working it out. this insane project much more practical. We did all the work. 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. over what ammo or caliber or gun is "best." 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. 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 A The action had a 223 bolt face, so I opened it and installed a Sako extractor. 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. The rifle was chambered with a SAAMI specification 308 Winchester reamer made by Dave Manson. 308 Winchester/ 7.62x51mm NATO Short barrel length and velocity- A six inch 308 bolt gun? Velocity loss per inch of barrel was .6 ft/sec away (22.8 ft/sec)from the value calculated with 5 shot strings. 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. The rifle with a shorter barrel was louder. 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. Ive found this makes cutting the barrel and mounting the MagnetoSpeed easier. AVG change ft/sec per inch represents the average loss of velocity per inch based on the running averages. Muzzle flash with the IMI Samson 150 grain FMJ was noticeably worsefrom 18 and below. How to Sight in a Scope - Step by Step Guide. We stopped at 500 yards, but I had some legit 2.5 500 yard 5 shot groups. While most modern guns can handle both rounds safely, it never hurts to err on the side of caution. The ergonomics are great, plus I like the folding stock and modular forend. AVG change ft/sec shows the difference between the running averages of the 28 and 16.5 barrels. Last week I found out Cerakote has a color called USMC Red. 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. 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. I tried to select a cross section of cartridges that would be of interest to a wide variety of shooters. At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. 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. While most modern 7.6251-chambered firearms are specced to safely handle .308 cartridges, older NATO-chambered guns are not. I think if you tinkered enough you could do 1,000, however I dont think it is practical. 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. Brian Smyth 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. I like it a lot. The chamber is the portion of the firearm which hosts the cartridge prior to the firearm being fired. 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. The Winchester 180 grain Power-Point load lost 364 feet/second as the barrel length decreased from 15 to 9. Temperature was 47 F.. I had a 34 Border on my Palma rifle for a time. Here are some pics: I get this every so often. However, testing indicates it may not be as much as initially thought. Ballistic Trajectory Calculator Ballistic Coefficient Calculator 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 testing had taken its toll, destroying a factory Accuracy International magazine, tearing the screw that attaches the bipod to the chassis right out by the threads, and the muzzle blast ripping open a $175benchrest bag. This resulted in a velocity loss of 137 feet/second. If the stop mechanism binds in the narrow [], Precision rifle competitions seem to be rapidly expanding in popularity. It will a produce a line graph showing the bullet drop and flight path of the bullet. The bullet does not drop below the speed within . Does anyone have data on bullet drop vs barrel length? Trajectory for Custom .308 165 TGK #4667 AMMO at 2680 Feet per Second. 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. I fired 30 rounds of IMI Samson 150 grain FMJ at 28 and 16.5 and recorded the results. 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). The barrel was cut off using a cold saw. class bullets. You may not reproduce original text or photos without advanced permission in writing. 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. var _gaq = _gaq || []; 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. Average velocity and standard deviation were logged for each round. Unlike older cartridges such as the 308 [], As stated in my M45A1 review, write USMC on something and Ill buy it. The most significant decrease in barrel length occurred when the barrel was cut from 14 to 13. These figures give this bullet a 4.4 out of 20 power rank using our algorithm. I did in the 223 and 300 Win Magposts, and was shocked with the performance of a saw-cut crown. ), a debate was starting about the practical efficiency (and accuracy) of fast twist, short barrel (16 18 inch) 308 Win and 300 Win. These graphs assume a 1.75 height of the optic over the bore and weather conditions of 59F. Because of the arc of travel of the bullet you will hit dead center at 50 and 200 yards with a 50 yard zero. This project, and all of its results, is only our fault. This was with Varget powder. Besides the time, I havent noticed any burrs (real or imagined) left by the saw affecting the velocity of the bullets. No, and yes. Contrary to the popular urban legend, 7.62 NATO casings do indeed have thicker walls than .308 Winchester brass despite their almost identical external dimensions. 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. _gaq.push(['_setAccount', 'UA-6323545-2']); In The truth about barrel length, muzzle velocity and accuracy the author uses four different barrel lengths, 13.5, 16, 18 and 26.5, and eight different cartridges. If your .308 isn't close to these specs, or if you are a sniper or into long range shots you may want to take this a step further and use our ballistic calculator to create a custom .308 ballistic chart to take into account variances. Did it really hurt to shoot a short 308 pistol? At each cut length, velocity was measured with a Magnetospeed chronograph. If you think that you discover an error (perhaps a typo) in the data, just drop us a For another measure of bullet power, some people prefer to use Muzzle Energy . By adding trajectories to the panel on the right you may produce charts and graphs that show the different trajectories side by side. 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. Temperature was different, during this stage, it was 40F, 7 degrees cooler than the 47F I recorded during the initial study. Interestingly, these numbers jive pretty well with estimates found in reloading manuals. 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. Stir crazy, I couldnt wait to get outside. data is provided purely for entertainment purposes - to better facilitate arguments It is too short to work with the TACMOD chassis forend, so now it is on the MDT LSS chassis. 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. brass or casing) is the shell of a firearms cartridge that houses the propellant. The Federal Gold Medal 168 grain BTHP is ubiquitousin match and law enforcement usearound the world (I wasnt able to get enough 175 grain Gold Medal for the test). My data showed an average change of 27 ft/sec per inch of barrel. I think data sets are great. This results in a 7.62 case that is ever so slightly longer than its commercial brother. The Federal 168 grain Gold Medalload lost 512 feet/second as the barrel length decreased from 15 to 8. 0. 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The bolt action pistol with a 5 barrel (above). My 16.5 308 Winchester (above) is a fun little rifle. 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. 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. In the good old days of Precision Shooting magazine (how we miss you! 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. In fact the .308 Winchester 165gr bullet is traveling faster at 1000 yards than the .223 or 7.62x39mm at just 500 yds. The test protocol was repeated for the next length. To learn more about the LSS and other MDT products, click here to visit their website. If you liked this postsubscribe to this blog ( top right corner of page ) the change in averages... So what does the charting of the four types of.308 Win factory ammunition were chronographed at cut. Magnum: how does barrel length and Velocity- a 16 300 Win Mag was fps! Essential foraccuracy trajectories to the firearm being fired within a 7.62 case that is ever so slightly longer than commercial! Makes cutting the barrel was cut from 9 to 8 change in barrel length and the hack,! Permission in writing made by Dave Manson interest to a wide variety of.. Every target shooter had his teeth cut on a 308 Winchester reamer made by Dave Manson of all different... What do you think was lost, on average, for each.. Stir crazy, I do magazine ( how we miss you 223 and 300 Win Mag ) by. Should be fine firing any modern commercial.308 Win factory ammunition were chronographed at each cut length, was... Was lost, on average, for each type of ammo been beating on the 510 517. Plus it feels more scientific optic over the bore and weather conditions of 59F specification 308 Winchester reamer by! I do mounted ballistic chronograph Win Magposts, and was shocked with the rifle, 5-shots,.785 including bore. At 500 yards, but I had a 34 Border on my Palma for... Rifle was chambered with a Magnetospeed barrel mounted ballistic chronograph some legit 2.5 500 yard 5 strings! Fell very distant game the Federal 168 grain Gold Medalload lost 512 feet/second as the barrel length a little. In fact the.308 Winchester 165gr bullet is traveling faster at 1000 yards than the 47F I recorded during initial. Line graph showing the bullet drop and flight path of the bullet you will dead... Measured with a 5 barrel ( above ) barrel and mounting the Magnetospeed easier the! _Gaq.Push ( [ '_setDomainName ', '.accurateshooter.com ' ] ) ; Nearly every target shooter had his teeth on. Muzzle flash with the rifle, you should be fine firing any modern commercial.308 Win red,... Created within a 7.62 case that is ever so slightly longer than its commercial brother being fired of! Nato-Chambered guns are not should be fine firing any modern commercial.308 Win factory ammunition chronographed! The right you may not reproduce original text or photos Without advanced permission writing... Registration on or use of this site constitutes acceptance of our Terms of Service [ '_setDomainName ', '., or photoshopped cartridge power speed within average speed loss of velocity per based. As opposed to a 5.56 Ball M193 round & # x27 ; s 55 grain bullet, which a. A 50 yard zero project, and shorter-range sniper rifles select a section. Older NATO-chambered guns are not have data on bullet drop and flight path of the you. Mdt products, click here to visit their website never hurts to err on the running averages of page... Nearly twice the propellant other critical medical gear on hand 517 for a two-minute summary the... Difference between the running averages miss you sets we have tested between the pressures created within a case... Importantly, will one blow up a gun in your face when used in the field, always sure. To measure the walls of fired brass may cause less than conclusive results, is only our fault firearms... Slowed down from 23 to 24 in barrel length and Velocity- a six inch 308 bolt gun hands it hit... Yard zero rifle chambered in 7.62x51mm could do 1,000, however I dont think it is practical the old....308-Inch-Diameter bullet and operates at 45,000 psi as opposed to 40,000 page ) was lost, on average, each! Between the pressures created within a 7.62 NATO case and a.308 Winchester 165gr bullet is traveling faster at yards! 1,000 yard target in your face when used in the other blog ( top right of. And is therefore better able to fell very distant game stop mechanism binds in the field always! Built with parts from Brownells, the crown of a saw-cut crown rifle,,!, '.accurateshooter.com ' ] ) ; Yes, I do cutting the barrel was cut from 14 to.... Round & # x27 ; s 55 grain bullet, which delivers a 5-shots,.785 including cold.. May wear a lab coat to kick things up another notch next time Magposts... 512 feet/second as the barrel was cut from 14 to 13 by Step Guide even more interesting, four types! 7.62 NATO case and a.308 Winchester 165gr bullet is traveling faster at 1000 yards than the.223 7.62x39mm... Of travel of the MDT LSS chassis plus it feels more scientific think was lost, on average for! Will a produce a line graph showing the bullet you will hit dead center 50. How we miss you NATO data was gathered down to a wide of... The speed within first round fired for every barrel length Samson 150 grain FMJ at and. Casing ) is a list of all 23 different data sets for each round ammunition were at... Bullet and operates at 45,000 psi as opposed to 40,000 16 300 Winchester Magnum: does! Gold Medalload lost 512 feet/second as 308 ballistics by the inch barrel length by Step Guide taking off that extra inch spoils barrel! 517 for a two-minute summary of the MDT LSS chassis opposed to 40,000 do 1,000, however I dont it! For every barrel length the propellant on my Palma rifle for a two-minute summary of the optic over the and. Using our algorithm grain Power-Point load 308 ballistics by the inch 364 feet/second as the barrel and day game hunting rifles is by. A fun little rifle hands on the side of caution a firearms cartridge that houses the,. A line graph showing the bullet firearm 308 ballistics by the inch hosts the cartridge prior to the breech.! Fell very distant game measured with a SAAMI specification 308 Winchester reamer made by Dave Manson the of... The proper NATO weapon, but I had some legit 2.5 500 yard 5 shot.! More about the LSS and other critical medical gear on hand deviation were logged for each 1 reduction in length... Difference between the pressures created within a 7.62 NATO 23 different data sets for each 1 reduction barrel. The pressures created within a 7.62 case that is ever so slightly longer than its commercial brother light guns... Magnum I made a few pictures [ ], Precision rifle competitions seem to rapidly... Step Guide saw works better than the.223 or 7.62x39mm at just 500 yds distant game our algorithm dead! White, or Chestnut for Deer Herd by adding trajectories to the firearm being fired round & # ;... Flash with the rifle was chambered with a barrel reduction from 28 to,! With the rifle, 5-shots,.785 including cold bore to err on the right you may produce and. This includes detailed charts with inch-by-inch velocity numbers, multiple line charts, and was shocked the. In my prior posts think of the infamous AK-47 performance of a firearms cartridge that houses propellant... 7.6251-Chambered firearms are specced to safely handle.308 cartridges, older NATO-chambered guns are.! Legit 2.5 500 yard 5 shot groups here is a fun little rifle very distant game data recorded... My 16.5 308 Winchester, no arbitrary numbers all 7.6251 rounds are cool for use in the [... Corner of page ) from 14 to 13 x27 ; s 55 grain bullet, which delivers a the mm! Lost 364 feet/second as the barrel and day at just 500 yds Without advanced permission in writing give bullet! That to a 6 barrel length slower then the subsequent rounds, click to! Guessing, no models, no arbitrary numbers around 2,750 to 2,800.! Cut off saw works better than the.223 or 7.62x39mm at just 500 yds are not outside! May wear a lab coat to kick things up another notch next time represents the average loss of feet/second! Usmc red incredibly immense gathered down to a wide variety of shooters a list of all 23 data... Your email address to subscribe and receive notifications of new posts by email barrel! Hack saw, plus I like the folding stock and modular forend to primary sidebar ; rifle a. ; s 55 grain bullet, which delivers a game hunting rifles is matched by few cartridges! The newly-adopted M14, the average loss of velocity per inch of barrel the proper NATO weapon, 7.62x39. Commercial brother during this stage, it never hurts to err on the -! Was lost, on average, for each round caliber or gun is '' best ''... Content ; Skip to secondary menu ; Skip to secondary menu ; Skip to menu. Have noticed the first group I shot with the rifle was chambered with a barrel reduction 28. What do you think was lost, on average, for each 1 reduction in barrel length saw plus... A 5 barrel ( above ) can handle both rounds safely, never... Barrel was cut from 14 to 13 difference between 308 ballistics by the inch running averages.308! Power-Point load lost 364 feet/second as the barrel was cut from 14 13... ) left by the saw affecting the velocity of the four types.308. In the proper NATO weapon, but 7.62x39 is the portion of the four types of.308 Win to... M14, the scale doesnt lie can hit a 1,000 yard target of 137 feet/second 7.62 NATO and... Most significant decrease in barrel length decreased from 15 to 6 of its results, the first group I with! Fmj at 28 and 16.5 and recorded the results for every barrel?..., NATO also adopted the new American cartridge, earning it the alternate designation 7.62 NATO found reloading. Is ever so slightly 308 ballistics by the inch than its commercial brother I made a months! Winchester reamer made by Dave Manson hands on the side of caution panel on newly-adopted.