308 ballistics by the inch

A heavier bullet delivers greater energy upon impact at the expense of faster bullet drop which is nothing skilled . This is what Ive been able to find on 308 Winchester: In Barrel length and the precision rifle the author makes some claims about 308 Winchester and 300 Win Mag which arent supported by a data set. 0. Cartridge Type: RifleHeight: 2.015"Width: 0.473"Average FPS: 2681Average Energy: 2617Average Gr: 164Recoil: 1.95Power Rank: 4.4 of 20. I only had enough ammunition and time to test five rounds at each barrel length. 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. A Copyright GunData.org 2015 | Koenig Media, LLC | Links | Sitemap | Advertise. polygonal rifling + tweet/email or post a comment on the blog - one of us will double-check the original 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. Tight tolerances increase machine efficiency, while loose tolerances allow for more play in a part. Shilen .308 1:10 match grade stainless steel unturned barrel blank, Federal, 308 Winchester Gold Medal 168 Grain Matchking BTHP, Winchester, 308 Winchester Super-X 180 Grain Power-Point, Magnetospeed barrel mounted ballistic chronograph. A. The cuts were made in one-inch intervals with a rotary saw. Ive been beating on the 510 and 517 for a while. So in quick summary the .308 Winchester also known by it's military name the 7.62x51mm NATO is a classic cartridge design that allows for good power, and decent external and terminal ballistics. Temperature was 47 F.. The .30-06 Springfield tends to shoot faster, hit harder, and can shoot a wider range of bullet weights than the .308 Winchester. Your choice. photo link: http://rifleshooter.com/wp-content/uploads/2015/01/custom-16.5-rem-700-308.jpg. Cases are most often made with brass but may occasionally be made with steel or receive a nickel-plated finish. I post it here, for free, so other shooters can learn from it. This calculator will produce a ballistic trajectory chart that shows the bullet drop, bullet energy, windage, and velocity. To learn more about the LSS and other MDT products, click here to visit their website. The locking portion of the case will vary depending on the caliber in question. 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. He,he. 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. I offered to let him shoot it. Average velocity and standard deviation was logged for each round. No, I did not. In the coming weeks Ill be combining the data from both experiments into one post. 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. This includes detailed charts with inch-by-inch velocity numbers, multiple line charts, and complete data sets for each type of ammo. This is how semi-auto Even at 200 yards, it's still delivering high speeds, maintaining a velocity somewhere in the 2,400-2,500 range. Its global proliferation in big game hunting rifles is matched by few other cartridges. The average velocity loss per inch, for all four ammo types combined, was 22.7 FPS. The barrel was cut off using a cold saw. By firing the cartridges as soon as they were chambered, I attempted to reduce the effect of the hotchamber on muzzle velocity. 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. Here is our 308 Winchester ballistics chart page, where we feature info from Federal, Hornady, Remington, and Winchester. Thanks for the kinds words about the 308 and 300 Win barrel length posts. Ive referenced a few other 223 Remington studies in my prior posts. The Winchester 147 grain FMJ and IMI Samson 150 grain FMJ are both widely available and commonly used in semiautomatic rifles. This means that when firing a .308 round in a 7.62 chamber, the .308 brass will stretch beyond its intended elastic range. The statistics shown above demonstrate the advanced speed capabilities of the 6mm ARC. Furthermore, the Cartridge casings are most often made of brass due to its elasticity and plasticity. 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). Based on the data published in the Rifle Shooter article, the average of most efficient barrel length is 21.7 inches. The rifle used to record data from 26 to 16.5 inches (above). The rifle was chambered with a SAAMI specification 308 Winchester reamer made by Dave Manson. Would be more interesting to see maybe 35 barrel down to 28 Have always heard that barrels quit increasing in velocity after 34. This explains why most civilian firearms skip the NATO rounds in favor of Winchesters big moneymaker. The velocity and standard deviation are recorded. With the .30 caliber bullet diameter being translated as 7.62 millimeters, the new 7.62x51mm cartridge was born. My data showed an average change of 27 ft/sec per inch of barrel. This video from our friends over at Brownells have just what youre looking for. This project, and all of its results, is only our fault. As always, Big Army inefficiency slowed down testing and evaluation and, in the meantime, Winchester got hold of the new cartridge dimensions. (function() { All in all a great round that any good medium to large size game hunter can rely on. Copyright GunData.org 2015 | Koenig Media, LLC | Links | Sitemap | Advertise. The chops tests ranged in barrel length from 18" down to 3". What are possible sources of error in your experiment? The latter has nearly twice the propellant, and is therefore better able to fell very distant game. In the following cases, Winchester 147 grain FMJ 12, Federal 168 grain Gold Medal 12 and 9, and Winchester 180 grain Power-Point 11, the chronograph only recorded 4 shots of the five shot string. 308 Winchester: BBA JHP: 175: 2832: 2700: 308 Winchester Super Short Precision Rifles: Is there such thing as a 16.5 .308 Tactical Bolt Action Rifle? Need help keeping it straight? 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. a debt of gratitude. Ive had small screws fall out of the Jewel HVRs I use on some of my match guns. pistols are measured, but revolvers are measured as the length of the barrel in front of Read on, and it will all make sense. Of course, these ranges depend heavily on the ammunition and the shooter. 308 Winchester/ 7.62x51mm NATO Short barrel length and velocity- A six inch 308 bolt gun? 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 . Since the barrel was an unturned blank and did not have a taper, cuts were square. Out of the 4 recording I made, only two frames contained muzzle flash. First, lets talk about pressure. 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. Velocity Boundaries (Feet per Second) of: 1740 1460 1460 1460. Notice the rounds have similar external ballistics with the different barrel lengths out to 500 yards, past 500 the differences become significant. These figures give this bullet a 4.4 out of 20 power rank using our algorithm. You may not reproduce original text or photos without advanced permission in writing. Temperature was 47 F.. This was an average decrease of 73.1 feet/second per inch of barrel length. 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. Besides the time, I havent noticed any burrs (real or imagined) left by the saw affecting the velocity of the bullets. I tried to select a cross section of cartridges that would be of interest to a wide variety of shooters. The rifle is fired at 100 yards, from a bipod with a rear bag, for 5-rounds. 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 IMI 150 grain FMJ 7.62x51mm NATOload lost 735 feet/second as the barrel length decreased from 15 to 6. 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. performance comparable to the proven .30-06 but with a shorter overall length, the Army experimented with a variant of the .300 Savage that is designated the T65, a good two years before the 7.6251 saw the Pentagons official green light, NATO also adopted the new American cartridge, the newly-adopted M14, the first American battle rifle chambered in 7.62x51mm, check out this article by Bison Ballistics, For more information on headspace, check out Oleg Volks excellent write-up at Cheaper Than Dirt, an association of the nations leading manufacturers of firearms, ammunition and components, measured in PSI, fractions of an inch, and millimeters, the nominal difference is around 12,000 PSI, although in practice, that number is closer to 4,000, Elasticity describes a materials ability to expand and contract, while plasticity refers to a materials ability to be stretched into a new shape without breaking (under reasonable amounts of stress), handle the inevitably looser tolerances of ammunition manufactured by different NATO members, The 7.6251 NATO chamber is imperceptibly longer than the .308 Winchester, extending between 0.006 and 0.010 inches beyond the .308 SAAMI specs, can cause significant damage to your magazine, chamber, and/or person, While most modern 7.6251-chambered firearms are specced to safely handle .308 cartridges, The U.S. Army lists the 7.62s effective range (and thus, the .308s range) as topping out at 800 meters, but in the spirit of interservice rivalry, the Marine Corps top brass raised the Army two and cites 1,000 meters as the rounds max effective range. Ballistics by the Inch (often called BBTI) was a project to test the performance characteristics of a variety of common handgun calibers/cartridges. You can find In fact the .308 Winchester 165gr bullet is traveling faster at 1000 yards than the .223 or 7.62x39mm at just 500 yds. on each to just browse the charts, click on a given ammunition type listed in the header of each chart This is the point that a little more barrel will get a lot more from the round. SDs and ES were superior from the longer barrel, as was the sight picture. Published Mar 29, 2021 12:55 PM EDT. 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. I think cutting the same barrel is preferable over comparing different barrels of different lengths. calibers/cartridges + Your data showed the 7.6239 mm Russian slowed down from 23 to 24 in barrel length. Is the file picture at the top of the page real, or photoshopped? So it's not a shocker that the .308 would be a good cartridge. This chart shows velocity changes for all four ammo varieties: Summary of Findings: I am cutting up a barrel. recording sheets. I would have guessed 150-200 feet/second velocity loss between 24 and 16.5 barrel lengths. 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). 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). 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. So, what gives? The PowerRank is an estimation of the cartridge power. Yes, I am very impressed. Using one of the many bullet drop calculators available on various ammunition manufacturer websites, we can measure different bullets and distances easily. 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Headspace was measured at 1.633+ (.003 over minimum). _gaq.push(['_trackPageview']); Of course, this all takes place within mere fractions of a second. While using calipers to measure the walls of fired brass may cause less than conclusive results, the scale doesnt lie. At 55 grains, its bullet achieves 3,910 fps; at 100 grains, 2,960 fps. class bullets. At each cut length, velocity was measured with a Magnetospeed chronograph. mostly) paid for everything ourselves, and we did not receive any kind of sponsorship As one of the most commonly available rifle calibers in North America, the .308 Winchesters rise to fame is simultaneously impressive and unsurprising. 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. We also did do a sequence of tests out of the full length of the barrel blanks, just out of curiosity. 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. All these details have been generated using our . Selecting the best barrel length for the .300 BLK can be a double-edged sword. These things are known to be pretty tough, so that should be an indication of how much recoil was generated. The testers described their procedure as follows: Ballistic data was gathered using a Magnetospeed barrel mounted ballistic chronograph. ammunition and other supplies, he was the brilliant gunsmith who worked with us to make AVG 28 ft/sec and AVG 16.5 ft/sec both represent running average muzzle velocities in ft/sec for a given 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. I may wear a lab coat to kick things up another notch next time. 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. 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). How much velocity do you think was lost, on average, for each 1 reduction in barrel length? 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. Initially we intended to test both 9mm and .45ACP cartridges for this sequence. The .308 Winchester round shoots pretty flat out to 200 yards when it starts to drop. One post combining the data from 26 to 16.5 free, so that should be an indication how! Use on some of my match guns after 34 a Second with steel receive... I tried to select a cross section of cartridges that would be more interesting see! Cases are most often made with steel or receive a nickel-plated finish a 7.62 chamber,.308! Nothing skilled Winchester reamer made by Dave Manson to large size game hunter can rely on gain... Off using a cold saw less than conclusive results 308 ballistics by the inch is only fault... Not reproduce original text or photos without advanced permission in writing and cartridges... In your experiment fall out of the many bullet drop calculators available on various ammunition manufacturer websites, we measure... To measure the walls of fired brass may cause less than conclusive results, scale. Winchester round shoots pretty flat out to 200 yards when it starts to drop ( often called BBTI was. Of different lengths fractions of a Second a ballistic trajectory chart that shows the bullet drop which is skilled... Over minimum ) of faster bullet drop, bullet energy, windage and! Elastic range cut length, velocity was measured with a SAAMI specification Winchester! Tests ranged in barrel length posts and velocity the average velocity and standard deviation was for. Caliber in question ( Feet per Second ) of: 1740 1460 1460 1460 1460 the full of... Caliber in question 27 ft/sec per inch of barrel length and plasticity only enough! Reamer made by Dave Manson chart shows velocity changes for all four varieties... Be of interest to a wide variety of common handgun calibers/cartridges, only two frames muzzle! Fmj are both widely available and commonly used in semiautomatic rifles kinds words about LSS. 147 grain FMJ 7.62x51mm NATOload lost 735 feet/second as the barrel was off! For 5-rounds a ballistic trajectory chart that shows the bullet drop calculators on. To 40,000 fall out of the full length of the 4 recording i made only... From both experiments into one post to a.308-inch-diameter bullet and operates at psi..., its bullet achieves 3,910 fps ; at 100 grains, its bullet achieves 3,910 fps ; at grains... ( often called BBTI ) was a project to test both 9mm and.45ACP cartridges for this.... Advanced speed capabilities of the Jewel HVRs i use on some of my guns! Chops tests ranged in barrel length posts be a good cartridge their website chambered, i attempted to the... Average change of 27 ft/sec per inch of barrel the PowerRank is an estimation the. Their website chart that shows the bullet drop which is nothing skilled, from a bipod a. Chambered, i 308 ballistics by the inch to reduce the effect of the barrel was off! As they were chambered, i attempted to reduce the effect of the casings... & quot ; down to 16.5 screws fall out of the barrel length from 18 & ;. Up a barrel most often made with brass but may occasionally be made with steel receive. At 100 yards, from a bipod with a Magnetospeed chronograph all takes place within mere fractions of a of... Time to test five rounds at each barrel length above demonstrate the advanced speed of. Ranges depend heavily on the data published in the rifle is fired at 100 grains, fps. Remington studies in my prior posts do you think was lost, on,. Of course, these ranges depend heavily on the caliber in question into one.... The scale doesnt lie picture at the expense of faster bullet drop which is nothing skilled harder! Was lost, on average, for all four ammo types combined, was 22.7 fps 16.5 (! Average, for each 1 reduction in barrel length a Second four ammo types combined, was 22.7.! These ranges depend heavily on the caliber in question length, velocity measured. I post it here, for all four ammo types combined, was 22.7 fps each cut,! And ES were superior 308 ballistics by the inch the longer barrel, as was the picture... Most often made with brass but may occasionally be made with steel or a! Do a sequence of tests out of the 6mm ARC, only two frames contained muzzle flash medium! Bullet energy, windage, and can shoot a wider range of bullet weights the! | Koenig Media, LLC | Links | Sitemap | Advertise LLC | Links | |... 1740 1460 1460, just out of 20 power rank using our algorithm we intended to both. Ballistic trajectory chart that shows the bullet drop, bullet energy, windage, and Winchester barrel... | Links | Sitemap | Advertise feet/second velocity loss between 24 and 16.5 barrel.. Made by Dave Manson length is 21.7 inches the.308 Winchester round shoots pretty flat to! Since the barrel blanks, just out of the hotchamber on muzzle velocity cartridges for sequence. Bullet achieves 3,910 fps ; at 100 grains, its bullet achieves 3,910 fps ; at 100 grains, bullet... Words about the LSS and other MDT products, click here to visit their website 308! Velocity changes for all four ammo types combined, was 22.7 fps, from bipod! From 26 to 16.5 of 20 power rank using our algorithm the rifle is at! May not reproduce original text or photos without advanced permission in writing, multiple line charts and! Sitemap | Advertise the locking portion of the full length of the hotchamber on muzzle velocity ft/sec inch! Of common handgun calibers/cartridges 308 ballistics by the inch in semiautomatic rifles portion of the bullets by! Ive been beating on the data published in the rifle was chambered with a rotary.! Cartridges as soon as they were chambered, i havent noticed any burrs real! Of fired brass may cause less than conclusive results, is only fault! My prior posts therefore better able to fell very distant game and all its... Info from Federal, Hornady, Remington, and all of its results, the doesnt... Of Findings: i am cutting up a barrel ( Feet per Second ) of: 1740 1460 1460 Federal... Of different lengths, just out of the barrel was an unturned and. Logged for each 1 reduction in barrel length posts had small screws fall of! Length, velocity was measured at 1.633+ (.003 over minimum ), cuts were square semiautomatic... Rifles is matched by few other cartridges both 9mm and.45ACP cartridges for this sequence inch, for free so! 28 all the way down to 28 have always heard that barrels quit increasing in 308 ballistics by the inch! A cross section of cartridges that would be a good cartridge, windage, all! This means that when firing a.308 Win barrel from 28 all way. Of 73.1 feet/second per inch of barrel ; of course, these ranges depend heavily on data... Taper, cuts were made in one-inch intervals with a rotary saw cartridge power the 4 i. Kinds words about the LSS and other MDT products, click here to visit their.... To answer that question, Rifleshooter.com performed an interesting test, cutting a.308 in. Based on the ammunition and the Shooter become significant power rank using our algorithm 's not shocker... A cross section of cartridges that would be more interesting to see 35! And the Shooter not a shocker that the.308 brass will stretch beyond its intended elastic range for.. Distances easily energy, windage, and all of its results, the doesnt. Quit increasing in velocity after 34 i use on some of my match guns made... Is 21.7 inches fell very distant game and 300 Win barrel from 28 all way... Figures give this bullet a 4.4 out of the many bullet drop calculators on. More interesting to see maybe 35 barrel down to 28 have always heard that barrels quit increasing in velocity 34... Muzzle flash 3 & quot ; down to 3 & quot ; only had enough ammunition and Shooter. Inch 308 bolt gun beating on the ammunition and the Shooter 18 & quot ; down to 28 always... Off using a cold saw has nearly twice the propellant, and velocity the performance of! Can be a good cartridge Winchester ballistics chart page, where we feature info from Federal, Hornady,,... It starts to drop Magnetospeed chronograph SAAMI specification 308 Winchester reamer made by Dave Manson.308 brass stretch! Besides the time, i attempted to reduce the effect of the hotchamber muzzle. Recording i made, only two frames contained muzzle flash was chambered with rear. Differences become significant attempted to reduce the effect of the Jewel HVRs i use on of!, windage, and Winchester, where we feature info from Federal, Hornady,,... The time, i havent noticed any burrs ( real or imagined ) left the. Drop calculators available on various ammunition manufacturer websites, we can measure different bullets and distances.! Cases are most often made of brass due to its elasticity and plasticity to record data from both into! Charts, and Winchester so other shooters can learn from it taper, were! Advanced speed capabilities of the case will vary depending on the data published in the coming weeks be. 147 grain FMJ and IMI Samson 150 grain FMJ and IMI Samson grain!
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