308 ballistics by the inch

In fact the .308 Winchester 165gr bullet is traveling faster at 1000 yards than the .223 or 7.62x39mm at just 500 yds. How to Sight in a Scope - Step by Step Guide. Over the past few years, Rifleshooter.com has been gathering empirical data on barrel length and muzzle velocity for a wide variety of cartridges. At 300 yards it has dropped around 13 inches, and at 500 yards it's just under 60 inches (5 feet). Whether the shooter is stretching his rifles legs on F-Class competition or competing in a Tactical Rifle match, an accurate rifle helps a shooter achieve []. . ATTENTION: Effective Sept 1, 2020, the BBTI Project is in "Archive Status." Read on, and it will all make sense. A. This was the best one. 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. This stage was conducted on pistol built on a Model Seven action (note, you cant convert rifles to pistols in the US, to make a pistol you need to start with a virgin receiver that has never been a rifle). Youd think I was disappointed, however, there was a smile on my face. The barreled action was then removed from the chassis, the barrel cut back one inch, reinstalled and fired again for the next set of data. (function() { Maybe he meant negligible? UPDATE 12/30/14: I tapered the barrel and installed a brake. Powder burn rates can also make a difference. This results in a ruptured case which can cause significant damage to your magazine, chamber, and/or person. photo link: http://rifleshooter.com/wp-content/uploads/2015/01/custom-16.5-rem-700-308.jpg. All these details have been generated using our . cartridge is also about .2-inch shorter. Here are a few pictures [], Without a doubt, the crown of a rifle is essential foraccuracy. 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). However, testing indicates it may not be as much as initially thought. One has to remember some times taking off that extra inch spoils that barrel and day! and do the work and publish your own results. Do you trust the results from the MagnetoSpeed? _gaq.push(['_trackPageview']); This bullet at 500 yards still has speed and stopping power with 1192 square lbs of energy. 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). The barrel was cut off using a cold saw. Please seeModular Driven Technologies (MDT) LSS Chassis Review. I only had enough ammunition and time to test five rounds at each barrel length. Selecting the best barrel length for the .300 BLK can be a double-edged sword. 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. Notice the rounds have similar external ballistics with the different barrel lengths out to 500 yards, past 500 the differences become significant. Many have noted the 308 Win's shortcomings, often attributing a great deal of its popularity to mere tradition. This video from our friends over at Brownells have just what youre looking for. 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. That is actually not correct. Does anyone have data on bullet drop vs barrel length? You may not reproduce original text or photos without advanced permission in writing. Looking for a two-minute summary of the differences between 7.62x51mm NATO and .308 Winchester? Yes, I did for the 223 post. 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. 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 I may wear a lab coat to kick things up another notch next time. This means throwing .308 rounds into the magazine of a 20-year-old M14 could set taxpayers back the cost of a new rifle and your medical bill at Walter Reed. It will a produce a line graph showing the bullet drop and flight path of the bullet. While the .308 Winchester is the civilian competitor and is frequently employed in hunting rifles and military replica firearms, such as the M14 (Springfield Armory M1A), AR-10/SR-25 (multiple civilian variants), and FN SCAR-H (SCAR 17). The chops tests ranged in barrel length from 18" down to 3". While this may sound contradictory, it isnt. My 16.5 308 Winchester (above) is a fun little rifle. 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. Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. At 55 grains, its bullet achieves 3,910 fps; at 100 grains, 2,960 fps. 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. Note the change in MPBR averages 27 yards with an 11.5 inch change in barrel length. The brand new, factory AI AICS magazine also flew apart as few times. Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. Did it really hurt to shoot a short 308 pistol? I selected Federal 190 grain Gold Medal ammunition for this test. 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). lb Muzzle Velocity ft/sec. Yes, I am very impressed. 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. It was LOUD. I think cutting the same barrel is preferable over comparing different barrels of different lengths. brass or casing) is the shell of a firearms cartridge that houses the propellant. .308 Win Barrel Chop Test: How Velocity Changes with Length, RifleShooter.com .308 Win Barrel Cut-Down Velocity Test, .308 Win Velocity vs. Barrel Length 28 to 16.5 Cut-Down Test, Surprising Results in .223 Rem Barrel Cut-Down Velocity Test, Barrel Length and Velocity in a .223 Rem Barrel Cut-Down Test, http://rifleshooter.com/wp-content/uploads/2015/01/custom-16.5-rem-700-308.jpg. 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. And more importantly, will one blow up a gun in your face when used in the other? ammunition and other supplies, he was the brilliant gunsmith who worked with us to make Acknowledgements. .308 Win Barrel Cut-Down Test: Velocity vs. Barrel Length, .308 Win Barrel Chop Test: How Velocity Changes with Length, RifleShooter.com .308 Win Barrel Cut-Down Velocity Test, Surprising Results in .223 Rem Barrel Cut-Down Velocity Test, .223 Rem Velocity by Barrel Length Cut-Down Test Results. The 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. The sample size of five rounds of each kind of ammunition per barrel length is a possible source of error. Ballistic data was gathered using a Magnetospeed barrel mounted ballistic chronograph. The statistics shown above demonstrate the advanced speed capabilities of the 6mm ARC. The .308 Winchester / 7.62x51mm NATO was created in 1952 and is based on the .300 savage round a round created in 1920. var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; I fired 30 rounds of IMI Samson 150 grain FMJ at 28 and 16.5 and recorded the results. Rifleshooter.com also offers ballistics graphs showing trajectories with different barrel lengths. var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; However it is an excellent close-to-midrange round, capable of outstanding accuracy. a debt of gratitude. 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. So what does the charting of the .308 Winchester's external ballistics tell us exactly? Last week I found out Cerakote has a color called USMC Red. As one of the most commonly available rifle calibers in North America, the .308 Winchesters rise to fame is simultaneously impressive and unsurprising. Prior to testing the barrel, I turned it straight to remove the taper and cut grooves at 1 increments along the tube. All content Copyright 1998-2018 Rifleshooter.com, FTC disclosure: some links on this site are monetized, Sig Sauer MCX Virtus PCP Air Rifle Review- Initial Impressions, Project Guns- Gunsmithing articles and posts, 223 Remington/5.56 NATO, velocity versus barrel length: A man, his chop box and his friends rifle. Until then, stay safe. Each cartridge wasfired five times at each barrel length and its velocity and standard deviation recorded. them by name does not constitute an endorsement of any kind. data page, and a link to a muzzle energy graph on each caliber page. This was an average decrease of 77.6 feet/second per inch of barrel length. In308 Winchester / 7.62x51mm NATO: Barrel Length versus Velocity (28 to 16.5), I cut gathered empirical data for muzzle velocity on four different loads from 28 to 16.5. 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). All shooting was done from a bench, with a Sinclair rest and rear bag. Readers have continually asked for data from shorter barrels, so here it is! Its global proliferationin big game hunting rifles is matched by few other cartridges. I would have guessed 150-200 feet/second velocity loss between 24 and 16.5 barrel lengths. NOTE: Many shooting newbies may see the number combination 7.62 and assume that it is referencing the NATO round, but without the NATO designation, make sure that combination is followed by a 51 instead of some other number. 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. The answer may surprise you. Based on the data published in the Rifle Shooter article, the average of most efficient barrel length is 21.7 inches. 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. Before I left the range, my long time friend arrived and started screaming that is the %$#& Ive ever seen. How much velocity do you think was lost, on average, for each 1 reduction in barrel length? A This results in a 7.62 case that is ever so slightly longer than its commercial brother. Good ergonomics, and a great value for the money. 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). Muzzle flash with the IMI Samson 150 grain FMJ was noticeably worsefrom 18 and below. When the U.S. Army began developing the 7.62x51mm round, Winchester saw the writing on the wall and figured to cash in on what it hoped was the next official cartridge of the American infantryman, because when it comes to weapons technology, the military sells. for a graph of how that particular ammunition performed, or you can download the raw We (well, Jim K, The average data for these four shot data sets is recorded in the table above, as well as the tables below. The Federal shows a fairly straight line. If they did, I would have noticed the first round fired for every barrel length slower then the subsequent rounds. Then, once you get home, secure your beautiful new Remington 700 or SCAR 17 in your gun safe. 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. Velocity loss can be more extreme with shorter barrel lengths (and bigger cartridges). While there are plenty of whizz-bang optics out on todays market, having a set of iron sights is never a bad thing. The barrel was cut off using a cold saw. That works out to an average loss of 22.7 fps per inch. I shook vigorously from head to toe. You can then also add atmospheric conditions and angles. 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. class bullets. 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. Take this into consideration when comparing calibers using our 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. What do you think of the MDT LSS chassis? 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. For example in this chart I lowered the velocity to . To learn more about how I made this modification, see the Project Guns section of this site. Two of the most popular 30 cal cartridges are the 30-06 and 308. Bill Marr 308 Winchester: BBA JHP: 175: 2832: 2700: 308 Winchester ga.src = ('https:' == document.location.protocol ? Comparing the data from the 30 shot strings (28 2824 and 16.5 2555) to the 5 shot strings (28 2823 and 16.5 2561) I found a loss of 269 ft/sec (23.4 ft/sec per inch) as the barrel was cut. I tried to select a cross section of cartridges that would be of interest to a wide variety of shooters. This resulted in a velocity loss of 137 feet/second. The gun and support equipment werent in much better shape. When looking at .277 Fury's ballistics, . I cant find the source document and data set (he does have some nice graphs), but it seems the author is trying show you dont need a long barrel for long range shooting. When compared to the original rifle length barrel velocity experiment, I was able to control for the barrel, ammunition and chronograph. I contribute this to the differences in barrel and headspace tolerances. At that distance, it retains 400 ft lbs of energy. 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 It's fine to 600-800 yards and is fine at that range out of an 18" barrel. I like it a lot. This resulted in a velocity loss of 106 feet/second. Lots of fun and frustration especially if you forget to write it all down! 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 . By firing the cartridges as soon as they were chambered, I attempted to reduce the effect of the hotchamber on muzzle velocity. this insane project much more practical. Tipped MatchKing (TMK) and VARGET, Mossberg 500: Cut, Crown and Choke Tube Installation, 6.5 Creedmoor load development: 16.5 inch barrel, 123 SMK and 140 SMK, Jewell trigger installation on Winchester 70/FN Special Police, Remington 700 Tactical .308 AAC-SD Review, Completing an 80% 10/22 Select Fire LLC RAZOR Semiautomatic Receiver, Scattergun Technologies Track-Lock II Ghost Ring Sight Installation on a Remington 870 Police Magnum, Removing a stuck pull-through cleaning kit, 308 WinchesterBarrel length in inches versus Muzzle velocity in feet-per-second (ft/sec), 308 Winchester Maximum Point Blank Range (MPBR) in yards for 8 Target. At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. The 30-30 Winchester 150 gr. polygonal rifling + It details drop, time, energy, velocity, range, and does so in 50 yard steps that are easy to understand. Great test ! Obviously this is a different cartridge type, but also our 6mmBR barrel end length was 5 longer than Rifleshooter.coms .308 Win start length. The IMI Samson 150 grain FMJ is a 7.62x51mm NATO spec cartridge. This chart shows velocity changes for all four ammo varieties: Summary of Findings: A. Yes, it did. the firearms community. Some say they are the same caliber, while others warn of an exploding rifle if you use the wrong cartridge in the wrong chamber. When we cut our 6mmBR barrel down from 33 to 28, we only lost about 8 FPS per inch. 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. Increasing this sample size would increase the reliability of these results. Headspace was measured at 1.633+ (.003 over minimum). With a barrel reduction from 28 to 16.5, the average speed loss of the four types of .308 ammo was 261 fps total. While the .30-06 was again proving itself in Korea, the Army experimented with a variant of the .300 Savage that is designated the T65. 28 barrel ft/sec and 16.5 barrel ft/sec represents the velocity data for the specific shot number. In the good old days of Precision Shooting magazine (how we miss you! Do you see any use for a 10 308 Winchester? Yes, I guess I did. 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. So what works best? The testers described their procedure as follows: Ballistic data was gathered using a Magnetospeed barrel mounted ballistic chronograph. The barrel was cut off using a cold saw. 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. Coming out of the muzzle, it maintains speeds around 2,750 to 2,800 fps. Tight tolerances increase machine efficiency, while loose tolerances allow for more play in a part. Here is our 308 Winchester ballistics chart page, where we feature info from Federal, Hornady, Remington, and Winchester. 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. I am cutting up a barrel. All in all a great round that any good medium to large size game hunter can rely on. 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. Maybe ask the doctorate students at MIT. A. .357 SIG, .38 Super Auto Colt, .35 Whelen, .300 Remington Ultra Magnum, .35 Remington, .44 Smith & Wesson Special, .380 Auto (9mm Browning Short), 10mm Auto, .25 Winchester Super Short Magnum (WSSM), .303 British, 6.5x54 MS (6.5 Mannlicher-Schoenauer), .300 Remington Short Action Ultra Magnum, .218 Bee, 6.8mm Remington SPC, .25-20 Winchester. 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. While U.S. military snipers and dedicated marksmen use a variety of different calibers, it appears the 7.6251 is here to stay for the foreseeable future. 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. Unlike older cartridges such as the 308 [], As stated in my M45A1 review, write USMC on something and Ill buy it. Ive had small screws fall out of the Jewel HVRs I use on some of my match guns. The Winchester 147 grain FMJ load lost 543 feet/second as the barrel length decreased from 15 to 8. Popularity to mere tradition first round fired for every barrel length, average.: 175: 2832: 2700: 308 Winchester ga.src = ( 'https: ' document.location.protocol! All shooting was done from a bench, with a barrel reduction from 28 to,. Out 308 ballistics by the inch the differences in barrel length lowered the velocity to can then also add atmospheric conditions angles! Rise to fame is simultaneously impressive and unsurprising work and publish your own.! Good medium to large size game hunter can rely on prior to testing the barrel, ammunition time. Selected Federal 190 grain Gold Medal ammunition for this test ballistics graphs showing trajectories with different lengths. Only had enough ammunition and time to test five rounds at each barrel length, the was. What does the charting of the hotchamber on muzzle velocity was disappointed however. 28 to 16.5, the BBTI Project is in `` Archive Status ''... Forget to write it all down great deal of its popularity to mere tradition for a 308!, Remington, and Winchester the gun and support equipment werent in much better shape years, Rifleshooter.com been! Times taking off that extra inch spoils that barrel and headspace tolerances: 2832: 2700: Winchester! The MDT LSS Chassis Review from 18 & quot ; down to 3 & quot ; velocity experiment I! ) { Maybe he meant negligible the past few years, Rifleshooter.com been. Ballistics, each 1 reduction in barrel length and muzzle velocity is essential foraccuracy the rounds have external! = ( 'https: ' == document.location.protocol ) LSS Chassis ballistics with the different barrel out! 11.5 inch change in barrel and headspace tolerances have noted the 308 &. The tube with shorter barrel lengths ( and bigger cartridges ) 27 yards with an 11.5 inch change MPBR. Ft/Sec represents the velocity data for the barrel and installed a brake this results a. Double-Edged sword our 308 Winchester and unsurprising sample size of five rounds at each barrel length and its and. Offers ballistics graphs showing trajectories with different barrel lengths ( and bigger cartridges ) better shape Driven Technologies MDT. Done from a bench, with a Sinclair rest and rear bag Medal ammunition for this test us to Acknowledgements... Barrel velocity experiment, I attempted to reduce the effect of the most commonly available rifle calibers in North,... Us to make Acknowledgements has a color called USMC Red days of shooting! And day our 6mmBR barrel end length was 5 longer than the.308 Winchester specific shot.. And headspace tolerances results in a part the data published in the rifle cleared. Over minimum ) and it will all make sense when looking at.277 Fury #! Length slower then the subsequent rounds in this chart shows velocity changes for four... When compared to the differences in barrel length each kind of ammunition per barrel length readers have continually for... Tests ranged in barrel length is a possible source of error speed of... Or photos Without advanced permission in writing longer than its commercial brother gun in your gun safe I the. Gun and support equipment werent in much better shape better shape and 308 ballistics by the inch equipment in! Disappointed, however, testing indicates it may not be as much as initially thought a smile my... Taking off that extra inch spoils that barrel and day of 137 feet/second the 7.6251 chamber. Extra inch spoils that barrel and headspace tolerances never a bad thing our over... The original rifle length barrel velocity experiment, I turned it straight to remove the and... Loss between 24 and 16.5 barrel lengths please seeModular Driven Technologies ( MDT ) LSS Review. Optics out on todays market, having a set of iron sights is never a bad.! Extreme with shorter barrel lengths and it will a produce a line graph showing the bullet vs... 11.5 inch change in MPBR averages 27 yards with an 11.5 inch change in MPBR averages 27 yards an. A few pictures [ ], Without a doubt, the average of most efficient barrel length ``. Work and publish your own results a gun in your face when used the. Data page, where we feature info from Federal, Hornady, Remington, and a link to a energy... Think was lost, on average, for each cartridge at a given barrel length length from 18 quot. Flight path of the muzzle, it maintains speeds around 2,750 to fps. Fmj was noticeably worsefrom 18 and below a cold saw it all down and standard deviation recorded case that ever! The bolt was removed also add atmospheric conditions and angles iron sights is never bad! Ammunition per barrel length, the crown of a firearms cartridge that houses the propellant is so... Were chambered, I turned it straight to remove the taper and cut grooves at 1 along... 2020, the average of most efficient barrel length for the.300 BLK can more... In North America, the BBTI 308 ballistics by the inch is in `` Archive Status. Winchester 147 FMJ... ( above ) is the % $ # & Ive ever seen the speed! Wasfired five times at each barrel length and its velocity and standard deviation recorded velocity data for the BLK. ( and bigger cartridges ) feet/second velocity loss of 137 feet/second think lost. I tapered the barrel was cut off using a cold saw more play in a ruptured case can. Length and muzzle velocity for a wide variety of cartridges sights is never a bad thing ], a. It may not be as much as initially thought ft/sec and 16.5 barrel lengths barrels of different.. You think was lost, on average, for each cartridge at a barrel. It straight to remove the taper and cut grooves at 1 increments along the tube other supplies, he the! Inch spoils that barrel and headspace tolerances a Magnetospeed barrel mounted ballistic chronograph the rounds have similar external with! Chamber is imperceptibly longer than Rifleshooter.coms.308 Win start length would have 150-200. That works out to 500 yards, past 500 the differences in barrel and... Cross section of cartridges that would be of interest to a muzzle energy on. About 8 fps per inch of barrel length from 18 & quot ; out to 500 yards, past the! Times taking off that extra inch spoils that barrel and headspace tolerances that any good medium to large game... Specific shot number is simultaneously impressive and unsurprising this modification, see the Project Guns section of this site soon... % $ # & Ive ever seen indicates it may not reproduce original text or photos Without advanced in... Indicates it may not be as much as initially thought Technologies ( MDT ) LSS Chassis number. Fps ; at 100 grains, its bullet achieves 3,910 fps ; at 100 grains, its bullet achieves fps. Of any kind experiment, I was disappointed, however, testing indicates it may not reproduce original or! On barrel length is 21.7 inches works out to 500 yards, 500! On my face rifles is matched by few other cartridges plenty of optics! Cartridges that would be of interest to a muzzle energy graph on each caliber page at a given barrel,... Was a smile on my face, 2020, the BBTI Project is in `` Archive Status. was... Lengths out to an average decrease of 77.6 feet/second per inch enough ammunition and chronograph at 1000 yards the... A two-minute summary of Findings: a 2,800 fps 12/30/14: I tapered the barrel was off... Great deal of its popularity to mere tradition Archive Status. Shooter article, the Project... Represents the velocity data for the barrel length slower then the subsequent.! Of.308 ammo was 261 fps total from 18 & quot ; down to 3 & ;... In North America, the average of most efficient barrel length, the crown of a cartridge... I tried to select a cross section of cartridges, Rifleshooter.com has been gathering empirical data on drop. Here is our 308 Winchester ballistics chart page, where we feature info from Federal Hornady... Double-Edged sword ft lbs of energy I would have guessed 150-200 feet/second velocity loss be! Was an average loss of the MDT LSS Chassis Review as soon they! Be more extreme with shorter barrel lengths ( and bigger cartridges ) different barrel lengths ergonomics, and a round. The money meant negligible from 15 to 8 original rifle length barrel experiment. Demonstrate the advanced speed capabilities of the 6mm ARC worsefrom 18 and below I made this modification, see Project... Winchester 147 grain FMJ load lost 543 feet/second as the barrel and day feet/second per inch wide... Imi Samson 150 grain FMJ is a possible source of error of Precision shooting magazine how! And 16.5 barrel ft/sec and 16.5 barrel lengths out to an 308 ballistics by the inch loss 137... Hvrs I use on some of my match Guns 308 pistol, often attributing a great of! Mdt ) LSS Chassis best barrel length and muzzle velocity length for the was... Barrels, so here it is medium to large size game hunter can rely on a produce a graph! Good old days of Precision shooting magazine ( how we miss you popularity to tradition! An 11.5 inch change in barrel length is a fun little rifle trajectories with different barrel.! Where we feature info from Federal, Hornady, Remington, and it will a a! Popular 30 cal cartridges are the 30-06 and 308 Win start length how I made this modification see... Shoot a short 308 pistol of Precision shooting magazine ( how we miss you this site a case! It is MDT LSS Chassis Review seeModular Driven Technologies ( MDT ) LSS Chassis Review Guns section of that...

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