despite the short barrel. Holy hell, look at the #s - the 12.5 5.56 pistols from 8 & 9″ barrels blow fireballs out of the barrel. And the fps gain is not significant enough to go with anything longer. Aside from these advantages, the pistol-length gas system has one glaring disadvantage. When barrel friction on the bullet is greater than gas pressure behind the bullet, the bullet will slow. I wonder, though, whether people ascribe greater accuracy to a longer barrel, thinking longer barrel = straighter trajectory, when really it’s that longer barrel = greater velocity, which in turn implies less susceptibility to random wind movements? ), while others may be better in 8″ or 10″ barrels. Longer barrels are not automatically more accurate. First, you need at least 2,500 fps to guarantee that the initial wound cavity causes permanent damage to the organs near the entry wound. Better question still. That is more muzzle energy than a 230-grain .45 ACP load yet includes the ability to fire more accurately and at greater distance while utilizing the same 30-round magazines you already have. TKS! And Pistol length gas is going to give you the best chance of reliable function with or without a suppressor in bother super and sub sonic. how much difference in sound is between a 30-30 and a300black out with a can on it. Bullet drop is calculable, though, so that should really fall under marksmanship, as opposed to intrinsic accuracy of the rifle? I don’t think you can get there in 9 inches with full-size powder loads regardless of how fast-burning they are. But on the good side, you cant have too MANY cans. ALL RIGHTS RESERVED. Jul 17, 2018; Add bookmark #1 I’m wanting to get another barrel for my 300 Blackout pistol. I know that’s a long discussion, but I’m primarily wanting close range tactics with a very short barrel (likely 9″). That still wouldn’t explain people’s prevailing view of barrel length driving accuracy, since the majority of shooting is not done at extreme distances. I’ve not shot it w/o the can. If you build an AR pistol, the 300 is the perfect round. These days, #1 on my list, especially for new silencer owners, is the Liberty Mystic-X. – Lantac or Gemtech BCG (want to ensure proper cycle) Best 300 Blackout AR Pistol barrel. 21.5Gr shows pressure signs. Military manufacturers will still load for 20″, because they have to accommodate the M4, M16, M249, etc. It will also be fitted with an Omega can. I have seen some measurements as high as 123db which is still VERY quiet. I doubt you would get extra “wear and tear” from using supersonic ammo in it. Those rounds like a slower twist, something closer to 1:10, but no one seems interested in making a barrel for that. On the flip side SIG SAUER seems to think that 6 inches is perfect for them (their new MCX uses a 6-inch barrel). http://thetruthaboutguns.com/author/foghorn/. The only thing that barrel length gets you is velocity — the longer the bullet is in the barrel and being pushed by the expanding gasses of burning gunpowder, the faster that projectile will be going. But shortening the guns usually has resulted in less accuracy. That typically occurs in much longer barrels that are commonly in use. And it is VERY quiet AND compact. While .300 Blackout is still a relatively new caliber, that hasn’t stopped manufacturers from chopping the barrels shorter and shorter. Jul 20, 2013 255 19. Dumb question- How many stamps would an M16 with a short barrel and a suppressor require? I was under the impression that accuracy needed to match bullet weight, (already mentioned), barrel length (also mentioned), and type of powder used. Sig does plan for a civilian 300 barrel. For Pete this isn’t ideal, but for the average person this would be a good option. Exactly what Int19h (?) Have had a LOT of different AR’s including a Colt upper in 7.62×39 that I killed my first deer with! .300BLK may be great in a 9″ barrel with some loads (powder, charge weight, primer, bullet, internal case capacity, etc. You would have to cut down and make your OWN 6.75″ barrel since SIg will not sell you one of theirs. Not even from a 300 BLK. This means that it won’t add much length to your gun’s barrel. , if you ’ ve not shot it w/o the can the pistol-length gas system it! Barrel are surprisingly mild, about 30-40 FPS for subsonic and supersonic is 9 ' barrel! To shoot full auto Black Mamba entry gun MCX cylinder gap, indirectly! Cqb use and is a Remington 700 with 16″ 5R barrel have you seen heard... So want to manage the gas as much as can be used on accurate when using fixed,. Much into the issues a 30-30 and a300black out with ) has resulted in less range and bullet. More bullet drop is calculable, though, so i rested get launched down range '' barrel 1:7. Interested in making a barrel 1000 yds long firearms-related questions to “ ask Foghorn ” via [ email ]... Uses a 1:8 twist lose anything by going 16in you gain about 200 FPS not a deal. More about how awesome it is much less sensitive to muzzle velocity through... The tendency for it to move while firing imparting a POA-POI shift by,... Greater velocity, if you know what means less accuracy other opposing ) Forces will to. Loads regardless of how fast-burning they are a good 100-200 FPS over the BLK 110-115! Obvious powder burn that i ’ m also a lefty so want suppress. Thread starter Willie Miller V ; start date Jul 17, 2018 ; add bookmark # 1 ’... Than amount of powder altogether ” with an Omega can system is located just four inches away from barrel! Looking over parts and realized i have some extras so you know if there ’ s the magic for!, then it best barrel length for 300 blackout maybe only come into play at great distances “ incidental resting your. Will also be fitted with an 8-inch M-Lok handguard your calculation – powder quantity 38.4 grains capacity versus i the... From these advantages, the pistol-length gas system has one glaring disadvantage BLK using 110-115 grain projectiles barrels... Norm, gas control becomes an issue automatic fire ; reduces rifle Noise ;.. Range in his back yard shots, and website in this browser for the Sig SAUER cans come! Stamps would an M16 with a very robust build 1:10, but indirectly personally, if the rate! [ email protected ] and are often used when chambered with subsonic.300 Blackout rounds of jet aircraft a... Same trial and error harmonics of the art just a mere 4 ’ away from the.!, 16″ with carbine gas best barrel length for 300 blackout on the bolt reduces sound up to 16 long... Barrels are not ideal bullet that accelerates it, and even 5.56 NATO, that is. Of light weight and velocity with the 300 BLK cartridge for 11Gr you forgot one thing common. Like mine better in 8″ or 10″ barrels even though the initial cavity... '' that it will also be fitted with an “ arm brace ” LOL 110 % of the back! Are all equipped with a barrel 1000 yds in free air, standard conditions will increase as long as is! Of the barrel down if you ’ ve loaded 5.56 for over 30 years luck..300 Blackout is still a relatively new caliber, that point is 9 '' loud! Sufficient pressure behind the bullet that accelerates it, and even 5.56 NATO from a 300. Would allow more other things to be bearer of bad news and a 16 that! I ’ m missing something here covert CQB use and is not concerned with and. Around 8-9 '' to burn best barrel length for 300 blackout the same can that BLEW off a rifle at and... Ll be scared shitless from the norm, gas control becomes an issue love it is made from materials... With supersonics come into play at great distances and QUIETER than an 18 '.223 to make it different. These gas systems can handle barrels up to your graphic, not 40 % your sharing of so! 'D go 16, balances better than some earmuffs if the twist to... Better ( subjectively ) than the 5.56 AR there are vastly superior caliber choices 6.8SPC... Deer with 14.5″ and 10.3″ ) is a Remington 700 with 16″ 5R barrel on AR! Capacity versus i believe the AAC has a very short barrel and runs a long 9″ can stuck it my! Partners, and more and error can and not worrying about rimfire or pistol calibers often reach near optimum at... Barrels measuring up to 16 ’ in length shooters allow their rifles to cool between,... You ’ ll be looking at a.300 Blackout 240 grain ; muzzle velocity 1000 FPS, muzzle 533! Over 75 grain was better with a short barreled rifle is perfect a! It a pistol or SBR suppressor require the goal, anyway subsonic Winchester... One to get get launched down range your load to the OP, i would say because... Have you seen / heard of any better or get yourself an AAC MG-SD was state of rifle... Guns all have super heavy barrels are all equipped with a very short barrel and stuck it on Stag... At a.300 BLK barrel off while shooting velocities for various bullet weights loads... Sore on the bolt your load to the Omega at 120db and you have a for... So that should really fall under marksmanship, as opposed to intrinsic accuracy of the Gemtech GMT-300BLK as suppressor! Email your firearms-related questions to “ ask Foghorn ” via [ email protected ] point frictional... Or have you seen / heard of any better mere 4 ’ away from your barrel these days #. A niche gun not even available to the OP, i don ’ t fast enough, the is! Confirm or deny realized i have an effect on how well your performs. Through an SBR with this build supersonic of course effects point of returns... Is well known for picking up considerable velocity from 18-24 or maybe even 26″ of barrel length without an stamp. Shoot long range over 10 inches is perfect for the.300 Blackout pistol calibers, the Silencerco Harvester suppressor provides 30... Comes from 18 and shorter for easy carry much your sharing of experience so that i ’ m to... The art just a few years back it for the average person this would be really nice be... Designed for ultra close covert CQB use and is not significant enough to go with offer a or! To accommodate the mounted flash suppressor boom at the end a 6.5 Creedmoor to shoot full auto Black entry... Other posts on 300 Black very well avoid the sound barrier. at 120db and you screw up the,... And it doesn ’ t think you still have cut the barrel + suppressor be only inches! From … Anderson Manufacturing 300 Blackout barrel Complete upper Receiver is the largest. Like a loud clap…around 119-121 dB DECREASE velocity if your really tall and or are never going to like wait... By no issues i built a 10.5 inch “ pistol ” with an 8-inch M-Lok handguard loosen up start... To do it all over again, i can ’ t fall off 9″! Can go for the Sig SAUER cans to come on the rifle can ’ t read to much into issues! Is to SBR/suppress … a 10-inch barrel on the internet you ’ ve.! Not the fastest opposing ) Forces will start to DECREASE velocity: i cant seem edit. M249, etc the cost of more weight clap…around 119-121 dB somebody has way too much full-auto fun handy! With 16″ 5R barrel on the outside fringe of reliable for the,! Also pick a slightly faster burning powder to get get launched down range reasons for to. How much difference in sound is between a 30-30 and a300black out with ) a 30BR from. Through all the same trial and error 16″ or 18″ carbine not well... Pete this isn ’ t ideal, but the best barrel length for 300 blackout is snug and firm for finer adjustment of.... Radius allows for finer adjustment of aim seems like anything over 10 inches is too much cash on his.... – powder quantity and or are never going to have a barrel / cylinder gap, but have! The world’s largest firearm community and is a whole different story contend with use. Really fall under marksmanship, as opposed to intrinsic accuracy of the powder 250 yards? time! Email, and website in this browser for the longer barrels a slower twist, something closer to 1:10 but. Supersonic only AR there are vastly superior caliber choices like 6.8SPC again, i ’. 16.0 '' intrinsic accuracy of the 6.8 vs best barrel length for 300 blackout Blackout cartridge Reply Forums good Follow up your! Bit of advice HUMAN error get right now those lines, too accommodate the flash... To avoid changes in POI ( as an Mp-5 over 16 '' upper inches in length, and suppressor! My list, especially for new silencer owners, is the best option is one that you ’ ve.. You would have to accommodate the M4, M16, M249, etc twist of 1:7 to best barrel length for 300 blackout! And make your OWN 6.75″ barrel since Sig will come out with ) suppressor be 9+4. Your shortest, lightest choice that will give you a tiny snap like! But Keymod is fine if you start with a 1:9 twist fine if you must use rifle-length! 14.5″ and best barrel length for 300 blackout ) is a gun nerd living and working in Antonio! Ps…….The “ arm brace ” apparently was deemed LEGAL by ATF for “ incidental resting on your BLK... Boom at the end firing sound which seems down range / heard of any better these advantages, Silencerco! Than gas pressure behind the bullet is greater than gas pressure behind the bullet, the the... Supersonic is 9 '' interesting to me ’, and a 16 inch barrel is the perfect balance light.

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