300 blackout barrel length chart 300 blackout barrel length chart
And adding a foot-long can to a full-length rifle is not optimal, particularly when you can push a 220 grain bullet to just under the speed of sound in six inches or so. The 300 AAC Blackout definitely works for hunters who want to use their AR15-platform rifle. For 300 AAC Blackout, that point is 9 inches of barrel. There are a few factors to consider when selecting the ideal barrel length for a 300 BLK rifle and determining its effective range. However, a 20+ inches barrel may be too unwieldy and impractical for anything but target shooting. It was designed to burn in short barrels and anything more is really just excess weight. The 300 Blackout is frequently available with 200 and 220 grain bullets. After investigation, AAC found the 7.6239 cases aggressive taper too extreme for a standard M4 magazine to accommodate. Sig ONLY uses that 6.75 (not 6) barrel length for their Military full auto Black Mamba entry gun MCX. Whether you decide to go long or short on your barrel is entirely a matter of what you are shooting at and where the shooting is taking place. I want to get a barrel and file a form1 but just havent yet. A successful hunt requires sneaking up on a target until you're close enough to take a clean and fatal shot. Perfect for integral suppressor or just using as an SBR/pistol. By and large, the relatively rapid loss of velocity confines the 300 Blackout to near medium and close ranges. For example, with a 10.5-inch barrel, the .300 Blackout clocks an average velocity of 2200 feet per second. I completely agree with the SDN-6, I have one too but like everything else, buying a can is a moment in time and you get what you get. But its the opposite with the 300 AAC? I dont know how the 30BR compares powder quantity wise to the 300 BLK, but that could account for the difference in barrel length. Just an old farts opinion! The. The 300 Blackout would never see mainstream military use, although it became popular in the civilian shooter market. Your longer barrel does add minimal velocity. My .460 XVR literally breathes fire. The disadvantage with direct threading is that it will loosen up and start backing off while shooting. The 300 Blackouts .30 caliber bullet can be made especially long, and as the result may weigh up to 220 grains quadruple the weight of the typical 223 Rem rounds. I dont think they are shipping as of yetwhich is a big question why. .the same content appeared at breachbangclear.com about a week ago, they dont attach a name to it either. Have been shooting 300 for a few years now. The difference between H4198 and TITEWAD would be a good example. QA/QD systems may add more tolerance stacking and complexity, but the silencer is snug and firm. This issue isnt unique to 300 Blackout bullets, though. However, even worse for accuracy is the projectile slowing from supersonic to subsonic velocity. A higher velocity will help a bullet fly with more power and speed, increasing how far a bullet can travel before gravity pulls it off its trajectory. https://en.wikipedia.org/wiki/.300_Whisper. As an example my .243 Winchester LR308 based rifle is fine with IMR 7828 speed but Ramshot Magpro is just too violent with the rifle as configured. The 300 Blackout round is an excellent choice for home defense as it combines power and efficiency with lethality when fired from a short-barreled rifle. 5.56 pistols from 8 & 9 barrels blow fireballs out of the barrel. That way you could further save length on the rifle. I wonder, though, whether people ascribe greater accuracy to a longer barrel, thinking longer barrel = straighter trajectory, when really its that longer barrel = greater velocity, which in turn implies less susceptibility to random wind movements? Though the .300 Blackout was designed to offer the best results in close-range targets, you can use it for long-range targets as well. At 10, the muzzle velocity hasnt yet reached its peak. Selecting the best barrel length for the .300 BLK can be a double-edged sword. Its a 30 second swap from 300blk to .556 The latter has nearly twice the propellant, and is therefore better able to fell very distant game. Survival AR-7 Rifle, http://blog.silencershop.com/300-blk-impressions/. While you can have a 9-inch .300 BLK barrel pistol, the best barrel length for .300 Blackout pistol is 6 inches. Putting a .308-caliber bullet in a .224-diameter barrel is a recipe for disaster. The 16-inch barrel also provides greater energy on impact, regardless of ammo type. They first looked to the 7.6239 for inspiration. My test gun is a Remington 700 with 16 5R barrel. (AAC) or have you seen / heard of any better? Please tell us more about how awesome it is. You are incorrect on one critical detail: Adding more barrel length after that point might still increase the velocity a bit, but the added weight isnt always worth the extra dollop of velocity.. The point is, based on the design parameters of the 300BLK round while you do get more velocity from a longer barrel the % increased velocity per inch increase in barrel isnt as much as with say a 5.56. Converting an AR-15 to fire 300 Blackout is as simple as swapping its barrel. I was understanding that my 5.56 with 55 grain bullet needed a twist of 1:7 to be right. ALL Bulletin content is copyrighted, 2023 AccurateShooter.com. By and large, the relatively rapid loss of velocity confines the 300 Blackout to near medium and close ranges. CQB isnt a place where bright flashes coming out of a barrel are an advantage, so using a 22-inch tube wont help much, if at all. They think its Fudd ammo. Subsonic 220Gr loading is 9.6Gr IMR 4227 and that is a near capacity load Id guess there is room for 11Gr. Have had a LOT of different ARs including a Colt upper in 7.6239 that I killed my first deer with! Part of that equation is the use of subsonic loads with heavy bullets and powder that burns completely in that abbreviated barrel. Converting an AR-15 to fire 300 Blackout is as simple as swapping its barrel. Remington now sells a variety of 300 BLK ammo: 1) 125 grain open-tip match with a custom Sierra bullet; 2) 220gr subsonic, and 3) 125gr AccuTip (photo below). Military manufacturers will still load for 20, because they have to accommodate the M4, M16, M249, etc. The article is filled with generic statements we all knew in 2009, and some incorrect statements that conflict with the dozens of articles TTAG has posted in the past on 300BLK; look uo Leghorns articles on 300BLK for good data. For an apples-to-apples comparison, the Hornady V-Max 110-grain load (also zeroed at 100 yards through 16 inches of barrel) has a muzzle velocity of 2,375 fps. Really -- the largest difference is barrel length. If youve ever noticed, experienced shooters allow their rifles to cool between shots, to avoid changes in POI. For varmint hunters, competitors and gun owners practicing at distance, supersonic .300 BLKs are big medicine. AR-platform rifles optimized to run subsonic 300 Blackout tend to fire supersonic ammo poorly. I think problems with any firearms are possible and the worst will show up on the internet (like snake and spider bites) because folks need help but its probably the exception not the rule! A lighter gun via barrel would allow more other things to be used. Greater velocity, if the longer barrel enables such, leads to a farther maximum point blank range. A 16-inch barrel is the longest available barrel for the .300 Blackout, and it is quite effective when it comes to long-range targets. dear sirs..just want you all to know how much, ..WAY DOWN DEEP IN THE PINEY WOODS WOOTEN. I have seen some measurements as high as 123db which is still VERY quiet. I strongly suspect thats where this comes from. Results are in inches/foot-pounds of energy and based on a 100-yard zero with the scope 1.5 inches above the bore. Stay tuned, because we will have more information on them as soon as that information becomes available. Mission accomplished. Pistol calibers often reach near optimum velocity at about 8-10; longer lengths may increase velocity, but only by slight amounts. Everything from .22lr to subsonic .308 Winchester, and even 5.56 NATO from a 16 barrel. Cartridge Overall Length: 2.02 inches. If you're looking for a multi-purpose load for the .300 AAC Blackout, this may be the best bullet. With the can on it, it also is ear safe and the 25yd accuracy is like the other one with the same type red dot. First of all, with 300 BLK, if you are switching from supersonic to subsonic rounds, you might want to be able to quickly make the change from unsuppressed to suppressed. We do not recommend choosing a shorter option because the barrel will not be long enough to sufficiently burn gunpowder and provide maximum force to propel the bullet from the muzzle. Having a longer or shorter barrel is a matter of understanding the dynamics of ammunition, barrel design, and overall shooting conditions before you settle on a preference. You have entered an incorrect email address! Attaching a 6 suppressor to this barrel length results in a total length of 14 to 16, which provides optimal muzzle velocity for accurate long-range shots. The .300 BLK bullets are 0.30 inch in diameter (7.62 mm) and the .223 Rem (5.56 mm) is 0.224 inch. And yes, the .300 blk is designed to burn off in 9, but its not guaranteed that every round you could possibly put through it will do so. At 16 inches, muzzle velocities are near their maximum. I dont know much about ballistics, but wouldnt the higher velocity associated with a longer barrel mean less bullet drop over longer distances, thus increasing accuracy? The kissing cousins resemble twins at a distance, but the similarities end at projectile girth. Shorter barrels do not result in less accuracy. When you pair the barrel with .300 Blackout ammo, you get an easy-to-carry gun that spits rounds capable of penetrating heavy barriers. We refer to it as one rotation over a particular inch of barrel. While on a 16-inch barrel, it reaches speeds of approximately 2400fps. With a 20-inch suppressed barrel, you can achieve a bullet velocity of over 2,630 feet per second (fps), leading to more impactful shots and reduced bullet drop. Most bullets from both cartridges weigh around 125-Grains. var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); By and large, the relatively rapid loss of velocity confines the 300 Blackout to near medium and close ranges. You remind me of that writer who was a big fan of the .270 back in the Field and Stream days. The 300 Blackouts sleeker bullet has a higher. 300 Blackout Fine-Tuning: Finding the Right Barrel Length for Your Rifle, For optimal performance with a suppressed, Bird Colonel Trashes Tin Eagles With False Testimony in California Assault Weapons Ban Case, Keith Olbermann Calls for Civil War as the Only Way to Stop Mass Shootings, Illinois Freedom Week Starts Today: Federal Court Blocks Enforcement of Illinois Assault Weapons Ban. Hey, man. 300 BLK by AAC: An Introduction by Paul Erhardt. I do anticipate hunting deer / pig with this build supersonic of course. A major benefit for me of using a 10 barrel on my blackout is that I can run a 9 or 10 handguard and still be able to use my can, that extra inch opens up a little bit more options in handguards. At 16 inches, .300 Blackout barrel muzzle velocity is close to its peak, giving you a powerful weapon for making accurate long-range shots. Higher velocity results in less drop at longer ranges, which of course effects point of impact. Ive had no problems with PSAs Cust Service. The 9 300 blackout barrel is the best overall barrel length with or without a suppressor, especially since an 8 barrel is the minimum warranty barrel length for many suppressor manufacturers. On the downside, the weight of these bullets prevents them from traveling far and maintaining a flat trajectory. said. Question of the Day: How Do You Spread the Pro-Gun Gospel? The numbers make it obvious its flatter shooting than the subsonic load. One for the M16 regardless of barrel length. There is obvious powder burn outside the barrel which is clearly visible on video. I have a Q Honey Badger Barrel Assembly which is 7 and a Q Trash Panda. Buy a .308 from a legit company and save yourself headaches. The more we all know, the better organized and stronger the shooting and hunting community will be. So many thanks for your article and any advice you can give. So would that be what theyre doing to make that so-called dragons breath novelty ammo, just adding a lot of extra powder to burn beyond the muzzle? Best twist rate for 300 Blackout? It happened that way because when the Russians developed the round, all of their 7.62mm barrel making machinery was built to make 1:10 twist barrels for a bazillion Mosin Nagants and a swag of machine guns in 7.62 x 54R. You can now purchase quality factory ammo and even premium Lapua 300 BLK brass. So Remington will be budget-priced UMC-brand 300 BLK ammo through at just $12.99 per box thats less than most other rifle cartridges than are more powerful than the .223. However, a longer barrel will lead to a weightier gun, and you may have trouble wielding it with one hand. This is one reason bench rest guns all have super heavy barrels. Pretty much the only reason for a 16 300BLK is if you dont ever plan on running a suppressor and dont want to register as an SBR. Our initial research data covered the relationship between barrel length and velocity for some 13 common handgun calibers/cartridges. A bullet also travels less horizontal distances from wind when it is faster.
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