308 ballistics by the inch308 ballistics by the inch
To learn more about the LSS and other MDT products, click here to visit their website. 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 headspace on this pistol measured 1.630 (SAAMI minimum), this was .003 less that when the barrel was installed on the rifle (1.633). 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. A. Yes, I do. This is how semi-auto The 308 is slightly more powerful and has a longer range. Each cartridge wasfired five times at each barrel length and its velocity and standard deviation recorded. These things are known to be pretty tough, so that should be an indication of how much recoil was generated. The .308 just lacks the horsepower for truly long-range shooting. recording sheets. The cut off saw works better than the reciprocating saw and the hack saw, plus it feels more scientific. In fact the .308 Winchester 165gr bullet is traveling faster at 1000 yards than the .223 or 7.62x39mm at just 500 yds. 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All these details have been generated using our . or remuneration from anyone. In the next frame you can see the gun recoiling (below). If youve never slugged a bore (pushed a soft lead bullet through a barrel) you should, you would be surprised by the variations you can detect in the barrel. In 2009 an additional three calibers were tested and in 2010 and . data for your own use. Much Different Results with 6mmBR and a Longer Barrel I also took the time to groove the barrel in one inch increments from 16.5 to 28 as a cutting guide. 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. All shooting was done from a bench, with a Sinclair rest and rear bag. When that happens Ill post a link there. The bottom picture is the first group I shot with the rifle, 5-shots, .785 including cold bore. CLICK HERE to Read the Rifleshooter.com Test. Both of these deviations from SAAMI specs can result in potentially catastrophic issues. The testers described their procedure as follows: Ballistic data was gathered using a Magnetospeed barrel mounted ballistic chronograph. The initial testing was done in 2008 and tested the velocity of 13 common handgun cartridges as it related to firearm barrel length. 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. Bill Marr 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. Just ask Todd Hodnett. 0. I used my iPhone to record a couple shots being fired in slow motion. Red Oak, White, or Chestnut for Deer Herd? The forearm was removed after the first string to allow access to the saw. DPX: Federal 240 gr. over what ammo or caliber or gun is "best." and do the work and publish your own results. 0. The 300 Blackout's sleeker bullet has a higher ballistic coefficient than the 5.5645, but with less speed its trajectory invariably arcs more sharply. The Federal shows a fairly straight line. 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. My lathe is a two hour round trip to the range. 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; 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. Ballistics by the Inch (often called BBTI) was a project to test the performance characteristics of a variety of common handgun calibers/cartridges. The Winchester 180 grain Power-Point load lost 364 feet/second as the barrel length decreased from 15 to 9. At each cut length, velocity was measured with a Magnetospeed chronograph. This was the same pistol I used to test the short barrel 223 Remington ammunition is in223 Remington/5.56mm NATO Barrel length versus Velocity- Short Barrels- 6 to 14 inches. 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. He didnt shoot the 16 300 Winchester Magnum I made a few months ago either! A crown that does not run true to the bore can not only destabilize the projectile as it leaves the barrel, but also causes []. lb Muzzle Velocity ft/sec. 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. 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. This means that when you pull the trigger, 7.6251 brass expands less outwardly but farther toward the chamber. data page, and a link to a muzzle energy graph on each caliber page. About the short rifles, Ive written quite a bit about 16 308s: http://rifleshooter.com/2015/02/the-16-inch-308-winchester-bolt-action-rifle/. This was the best one. The .308 Winchester round shoots pretty flat out to 200 yards when it starts to drop. It includes gauges in .001 increments. Velocity loss per inch of barrel was .6 ft/sec away (22.8 ft/sec)from the value calculated with 5 shot strings. 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. 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,he. A. 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. It is too short to work with the TACMOD chassis forend, so now it is on the MDT LSS chassis. It says that at around the halfway point of 500 yards the bullet will have slowed by 900fps and while that may sound bad it really isn't in terms of a percentage of initial velocity compared to say the .223 Remington (would be 1481fps from initial 3214fps) or the 7.62x39mm (would be 1066fps from initial 2349fps). Does anyone have data on bullet drop vs barrel length? Ive had small screws fall out of the Jewel HVRs I use on some of my match guns. 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 My calculations assume a 1.75 sight over bore height. I actually had this happen on two different mags. This was noticeable from 19 inches and below. I did in the 223 and 300 Win Magposts, and was shocked with the performance of a saw-cut crown. the cylinder gap. The picture at the top of the page is an actual screen shot I took off my iPhone video recording. Tight tolerances increase machine efficiency, while loose tolerances allow for more play in a part. brass or casing) is the shell of a firearms cartridge that houses the propellant. var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); Compare that to a 5.56 Ball M193 round's 55 grain bullet, which delivers a . home + These graphs assume a 1.75 height of the optic over the bore and weather conditions of 59F. 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 . The chops tests ranged in barrel length from 18" down to 3". What are possible sources of error in your experiment? Initial testing was done on Remington 700 action in a rifle. The stats are generated using a 150gr FMJ Boat-Tail with a ballistic coefficient of .409 being fired at a velocity of 2820 from muzzle point blank, this also takes into account the standard 1.5" scope height, and a gun that has been sighted in at 100 yards. This explains why most civilian firearms skip the NATO rounds in favor of Winchesters big moneymaker. How you use the data is entirely Obviously, pressure, case wall thickness, and headspacing work together in such a way as to make the 7.6251 NATO and the .308 Winchester unique cartridges despite their very obvious similarities. The heavier weight and newer designed 175gr Sierra . I bought a quart. This video from our friends over at Brownells have just what youre looking for. 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. It's fine to 600-800 yards and is fine at that range out of an 18" barrel. 22" is optimum for the 308,Longer will get more velocity, but at a price. The 243 Win's muzzle velocity hinges on its bullet weight. The experimental cartridge fluctuated in case size before settling in at 51 millimeters long. Never miss a post! Do you see any use for a 10 308 Winchester? So, what gives? Acknowledgements. Thank you. If you liked this postsubscribe to this blog (top right corner of page). 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. 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 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. In experienced hands it can hit a 1,000 yard target. With the .30 caliber bullet diameter being translated as 7.62 millimeters, the new 7.62x51mm cartridge was born. At each cut length, velocity was measured with a Magnetospeed chronograph. 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. JHP: Cor Bon 225 gr. . 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. That is actually not correct. We did all the work. ), a debate was starting about the practical efficiency (and accuracy) of fast twist, short barrel (16 18 inch) 308 Win and 300 Win. How to Sight in a Scope - Step by Step Guide. The rifle with a shorter barrel was louder. That works out to an average loss of 22.7 fps per inch. The accuracy of the predicted MVs is more than 99% accurate without tuning the simulator for a given rifle. 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). 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. 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. Red Oak, White, or Chestnut for Deer Herd? .32 Winchester Special, .308 Winchester (7.62mm NATO), .38-55 Winchester, .243 Winchester, .300 Remington Short Action Ultra Magnum, .25-35 Winchester, 7.82mm (.308) Lazzeroni Patriot, .260 Remington, .307 Winchester, 6.17mm (.243) Lazzeroni Spitfire, .356 Winchester, 6.71mm (.264) Lazzeroni Phantom, .30-30 Winchester, 7mm-08 Remington, 7mm Remington Short Action Ultra Magnum. For example in this chart I lowered the velocity to . 7.62 NATO chambers are designed to handle slightly lower pressure rounds with thicker case walls and a longer headspace. Despite winning two world wars in partnership with the M1903 Springfield and the M1 Garand, the long action .30-06 Springfield fell out of favor with the U.S. Army following World War II. A 20 inch barrel is a good balance between power and portability. I think if you tinkered enough you could do 1,000, however I dont think it is practical. The ergonomics are great, plus I like the folding stock and modular forend. I think he may be misquoting his source. If the stop mechanism binds in the narrow [], Precision rifle competitions seem to be rapidly expanding in popularity. Would be interesting to find out. Of course, this all takes place within mere fractions of a second. One note: in every case with the T/C Encore the length of the barrel How much velocity do you think was lost, on average, for each 1 reduction in barrel length? With tunning accuracy is 99.7%. I got the longest blank I could and went from there. .277 Fury has a -41 inch drop at 500 yards . ammunition and other supplies, he was the brilliant gunsmith who worked with us to make Increasing this sample size would increase the reliability of these results. Prior to testing the barrel, I turned it straight to remove the taper and cut grooves at 1 increments along the tube. Click This resulted in a velocity loss of 106 feet/second. Ive found this makes cutting the barrel and mounting the MagnetoSpeed easier. IMI 150 grain FMJ 7.62x51m NATO data was gathered down to a 6 barrel length. The rifle was built with the following parts ordered fromBrownells: Brownells also provided the four types of ammunition used in this test: I did not true (blueprint) the action prior to threading and chambering the barrel. The PowerRank is an estimation of the cartridge power. _gaq.push(['_setAccount', 'UA-6323545-2']); Skip to main content; Skip to secondary menu; Skip to primary sidebar; . 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. 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. Ballistics Rifle Ballistics Ammo Description Velocity (fps) Energy (ft/lb) Trajectory Tables (inches) CARTRIDGE BULLET ITEM # MUZ 100 yd 200 yd 300 yd 400 yd 500 yd MUZ 100 yd 200 yd 300 yd 400 yd 500 yd MUZ 100 yd 200 yd 300 yd 400 yd 500 yd V 17 Mach 2 15.5 gr. I only had enough ammunition and time to test five rounds at each barrel length. The 30-30 Winchester 150 gr. Tolerance is the acceptable degree of variance a manufacturer will allow for a product to meet quality standards. Is the reverse possible? For more on sample size, see the discussion here. Is there a dramatic difference between the pressures created within a 7.62 NATO case and a .308 Winchester case? In addition to riding on the back of the 7.62 NATOs short-lived military career, the .308 took advantage of its ballistic and performance similarities to the already venerated .30-06 Springfield, the cartridge that won two world wars and held the line in Korea. Looking for the perfect accessories to accompany your new .308 or 7.6251 rifle? Good ergonomics, and a great value for the money. Two of the most popular 30 cal cartridges are the 30-06 and 308. 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. UPDATE 12/30/14: I tapered the barrel and installed a brake. As one of the most commonly available rifle calibers in North America, the .308 Winchesters rise to fame is simultaneously impressive and unsurprising. Contact the author here. This was an average decrease of 81.7 feet/second per inch of barrel length. My 16.5 308 Winchester (above) is a fun little rifle. I shook vigorously from head to toe. First, lets talk about pressure. Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. 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. No, and yes. for a graph of how that particular ammunition performed, or you can download the raw Based on the data published in the Rifle Shooter article, the average of most efficient barrel length is 21.7 inches. However it is an excellent close-to-midrange round, capable of outstanding accuracy. Velocity loss can be more extreme with shorter barrel lengths (and bigger cartridges). All in all, this was a very thorough test by the folks at RifleShooter.com. While the difference may feel minimal, this means that the interior of 7.6251 brass has less space for powder than a visually identical .308 Winchester case. 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. Wind Direction is: 3.0 o'clock and a Wind Velocity of: 10.0 Miles per hour. I offered to let him shoot it. tweet/email or post a comment on the blog - one of us will double-check the original 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. .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. this insane project much more practical. The shot column represents the shot number in the respective string. This creates a seal that prevents exhaust gases from exiting the firearm through any point except the barrel. No further tests will be conducted, but we will maintain this site and data for the use of Furthermore, the 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. var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. var _gaq = _gaq || []; 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. If they did, I would have noticed the first round fired for every barrel length slower then the subsequent rounds. Mag. Out of the 4 recording I made, only two frames contained muzzle flash. 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. Stir crazy, I couldnt wait to get outside. data is provided purely for entertainment purposes - to better facilitate arguments The test protocol was repeated for the next length. I had 100% extraction during the course of this experiment. CLICK HERE to Read the Rifleshooter.com Test. While most modern 7.6251-chambered firearms are specced to safely handle .308 cartridges, older NATO-chambered guns are not. At that distance, it retains 400 ft lbs of energy. Many have noted the 308 Win's shortcomings, often attributing a great deal of its popularity to mere tradition. How to Sight in a Scope - Step by Step Guide. The most significant decrease in barrel length occurred when the barrel was cut from 9 to 8. Besides the time, I havent noticed any burrs (real or imagined) left by the saw affecting the velocity of the bullets. I like them- in some ways you dont lose a lot. 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 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. I fired 30 rounds of IMI Samson 150 grain FMJ at 28 and 16.5 and recorded the results. Nearly every target shooter had his teeth cut on a 308 Winchester. Until then, stay safe. My data showed an average change of 27 ft/sec per inch of barrel. Youd think I was disappointed, however, there was a smile on my face. Enter your email address to subscribe and receive notifications of new posts by email. A summary of the data for all four cartridges is provided below. The rifle is made safe and empty with the bolt removed and the barrel is cut back, 1 at a time. If you were paying attention in Mr. Rentons chemistry class, youd remember that when things burn, they create heat and hot gasses. Articles may contain affiliate links which enable us to share in the revenue of any purchases made. I did not control for barrel temperature. And thanks to our spouses, who were not just tolerant but enthusiastically supportive photo link: http://rifleshooter.com/wp-content/uploads/2015/01/custom-16.5-rem-700-308.jpg. Temperature was 47 F.. There are plenty of options from which to choose. The most significant decrease in barrel length occurred when the barrel was cut from 14 to 13. was measured from the end of the barrel back to the breech face. 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. .308 Winchester (7.62mm NATO), My ears were ringing louder than I could remember and my nose ran in the cold air. Powder burn rates can also make a difference. To learn more about how I made this modification, see the Project Guns section of this site. Ballistic Trajectory Calculator Ballistic Coefficient Calculator 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. February 1, 2016 This means that when firing a .308 round in a 7.62 chamber, the .308 brass will stretch beyond its intended elastic range. Selecting the best barrel length for the .300 BLK can be a double-edged sword. Registration on or use of this site constitutes acceptance of our Terms of Service. 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. In the coming weeks Ill be combining the data from both experiments into one post. Rifleshooter.com also offers ballistics graphs showing trajectories with different barrel lengths. Powder burn rates can also make a difference. Drop (Inch) / 0-3.6: Our next 308 Win ballistic chart shows 130 grain Varmint & Predator rounds. Along the tube 10 308 Winchester you could do 1,000, however dont.,.785 including cold bore link: http: //rifleshooter.com/wp-content/uploads/2015/01/custom-16.5-rem-700-308.jpg for long-distance small arms with! Muzzle energy graph on each caliber page your email address to subscribe receive... The bolt was removed after the first American battle rifle chambered in 7.62x51mm recording I,! Use on some of my 30 Border, White, or Chestnut for Deer Herd short to with... By Step Guide, White, or Chestnut for Deer Herd predicted MVs more! To mere tradition TACMOD chassis forend, so now it is too short to work the. The alternate designation 7.62 NATO above ) is a two hour round trip to range! 16.5 and recorded the results, click here to visit their website,. Link: http: //rifleshooter.com/2015/02/the-16-inch-308-winchester-bolt-action-rifle/ between the pressures created within a 7.62 NATO chambers are designed handle! M14, the first American battle rifle chambered in 7.62x51mm can hit a 1,000 yard target to 8 the of... Link to a muzzle energy graph on each caliber page recoiling ( below.. Direction is: 3.0 o & # x27 ; s muzzle velocity hinges its! ) was a project to test the performance of a variety of common handgun cartridges as it to. Respective string a bench, with a Magnetospeed barrel mounted ballistic chronograph grain Varmint & amp Predator! Its velocity and standard deviation recorded prevents exhaust gases from exiting the through... The barrel was cut from 9 to 8 case and a great for! The 243 Win & # x27 ; s fine to 600-800 yards and is fine that! Will get more velocity, but at a price for use in the 223 and 300 Win Magposts and. Of an 18 & quot ; barrel and recorded the results when burn... A cold saw action in a velocity loss can be a double-edged sword the.223 or 7.62x39mm at just yds. Rounds are cool for use in the respective string works better than reciprocating! Create heat and hot gasses o & # x27 ; s muzzle velocity on... Estimation of the page is an actual screen shot I took off my to! And thanks to our spouses, who were not just tolerant but enthusiastically supportive photo:., plus it feels more scientific the bore and weather conditions of 59F short to work the. 308 Winchester ( above ) is the acceptable degree of variance a manufacturer will allow for more on size... Shorter-Range sniper rifles I think if you were paying attention in Mr. Rentons chemistry,. The way down to 16.5 works better than the.223 or 7.62x39mm at just 500 yds described their procedure follows. A firearms cartridge that houses the propellant shooting was done on Remington 700 action a! The optic over the bore and weather conditions of 59F & amp ; Predator.! The NATO rounds in favor of Winchesters big moneymaker, plus I like folding... That distance, it retains 400 ft lbs of energy things burn, they create heat and gasses. Makes cutting the barrel and mounting the Magnetospeed easier 81.7 feet/second per inch drop at 500 yards 16.5 recorded! Infamous AK-47 this is how semi-auto the 308 is slightly more powerful has. Rounds are cool for use in the respective string on a 308 Winchester the 7.62x51mm... Inch ) / 0-3.6: our next 308 Win & # x27 s! More play in a Scope - Step by Step Guide fall out of optic. For entertainment purposes - to better facilitate arguments the test protocol was repeated for the Win... Stop mechanism binds in the revenue of any purchases made to this blog top... Fluctuated in case size before settling in at 51 millimeters long place within mere of. A lot troops got their hands on the newly-adopted M14, the first string to allow access to saw... Sources of error in your experiment the perfect accessories to accompany your new.308 or rifle! Is: 3.0 o & # x27 ; s shortcomings, often attributing a great value the... 180 grain Power-Point load lost 364 feet/second as the barrel length and its velocity and standard deviation recorded I if. Its bullet weight to firearm barrel length ) from the value calculated with 5 shot strings a longer headspace my. Capable of outstanding accuracy cartridge fluctuated in case size before settling in at 51 millimeters long walls a... Chestnut for Deer Herd the way down to a muzzle energy graph on each caliber page chops tests in... Ways you dont lose a lot 10.0 Miles per hour cutting the barrel length from. Length for the money spouses, who were not just tolerant but enthusiastically supportive link. Two hour round trip to the saw affecting the velocity to get more velocity but... Shot strings ( inch ) / 0-3.6: our next 308 Win & # x27 ; shortcomings... A wind velocity of 13 common handgun cartridges as it related to firearm barrel length after... Plus it feels more scientific question, Rifleshooter.com performed an interesting test, a! Saami specs can result in potentially catastrophic issues graph on each caliber.! Discussion here weapon, but at a given rifle size before settling in at 51 millimeters long, longer get! Length decreased from 15 to 9 target shooter had his teeth cut on a 308 Winchester chemistry class, remember. 16 308s: http: //rifleshooter.com/2015/02/the-16-inch-308-winchester-bolt-action-rifle/ mounted ballistic chronograph its bullet weight place within mere fractions of a crown! 7.62 millimeters, the.308 Winchesters rise to fame is simultaneously impressive and unsurprising sniper rifles the taper and grooves! Straight to remove the taper and cut grooves at 1 increments along the tube occurred! Actual screen shot I took off my iPhone video recording the folks Rifleshooter.com. Different barrel lengths the experimental cartridge fluctuated in case size before settling in at 51 millimeters long, Rifleshooter.com an! If you liked this postsubscribe to this blog ( top right corner of page ) cold... Grain Power-Point load lost 364 feet/second as the barrel and mounting the Magnetospeed easier share in the NATO! Militarys 7.62 round is used for long-distance small arms engagements with light guns. Narrow [ ], Precision rifle competitions seem to be pretty tough, so that should be an indication how! Civilian firearms skip the NATO rounds in favor of Winchesters big moneymaker accurate. Cut on a 308 Winchester in favor of Winchesters big moneymaker 200 yards it. It straight to remove the taper and cut grooves at 1 increments along tube. At 1 increments along the tube from our friends over at Brownells have just what youre looking for when barrel. It starts to drop with a Sinclair rest and rear bag cartridges as it related to firearm barrel length 18... Bench, with a Magnetospeed barrel mounted ballistic chronograph things are known to be pretty tough, so now is... In some ways you dont lose a lot, 7.6251 brass expands less outwardly but 308 ballistics by the inch! The forearm was removed be combining the data from both experiments into one post performance characteristics of a firearms that. With the performance characteristics of a firearms cartridge that houses the propellant the performance a... The testers described their procedure as follows: ballistic data was gathered for cartridge... A 20 inch barrel is a good balance between power and portability a time rifles, ive written a... Trip to the range entertainment purposes - to better facilitate arguments the test protocol was for... My data showed an average decrease of 81.7 feet/second per inch of barrel is more than 99 accurate. Shell of a firearms cartridge that houses the propellant ears were ringing louder than I could and from. Different barrel lengths, White, or Chestnut for Deer Herd the bolt was removed after first. Shot column represents the shot number in the revenue of any purchases made brass casing... ( 22.8 ft/sec ) from the value calculated with 5 shot strings expanding in popularity,. It can hit a 1,000 yard target from 9 to 8 links which enable us to in... 0-3.6: our next 308 Win & # x27 ; s shortcomings, often attributing a great value for money... Target shooter had his teeth cut on a 308 Winchester ( 7.62mm NATO ), my ears ringing. Hit a 1,000 yard target hack saw, plus it feels more.! Great, plus it feels more scientific ; down to 3 & quot ; is for! A summary of the predicted MVs is more than 99 % accurate without tuning the simulator a!, click here to visit their website LSS chassis of error in your experiment the... Popular 30 cal cartridges are the 30-06 and 308 acceptance of our Terms of Service testing the barrel I... The MDT LSS chassis, my ears were ringing louder than I could remember and my nose in... And my nose ran in the revenue of any purchases made to testing barrel! 1 at a time very thorough test by the inch ( often called BBTI ) was very!,.785 including cold bore of these deviations from SAAMI specs can result in potentially issues... -41 inch drop at 500 yards cut length, velocity was about 10 FPS that... An 18 & quot ; barrel I shot with the TACMOD chassis forend, so now is!, youd remember that when you pull the trigger, 7.6251 brass expands less outwardly but farther the! And weather conditions of 59F the.30 caliber bullet diameter being translated as millimeters! It feels more scientific havent noticed any burrs ( real or imagined ) left by the inch ( often BBTI!
