Groups 110% of the size of my 16 5R barrel on the 700 test gun. Part of todays confusion over 300 Blackout effective range and barrel length often stems from this flavor. [Email your firearms-related questions to Ask Foghorn via[emailprotected]. Gun Review: Henry U.S. I then hit it 15 times in a row. A mystique surrounds the .300 BLK (AAC Blackout), and it overshadows this utility players ability to deliver All-Star numbers in a variety of roles. How is the recoil of the 6.8 vs 300 Blackout? Greater velocity, if the longer barrel enables such, leads to a farther maximum point blank range. Those rounds like a slower twist, something closer to 1:10, but no one seems interested in making a barrel for that. There its drop is more than 30 feet (with a 100-yard zero) and energy drops to 309 foot-pounds. A longer barrel, because of its increased surface area, provides more room for cooling in instances where you shoot continuously. There arelots ofbetter options that have come on to the market in the last few years, and the 762-SDN-6 just hasnt held up to the newer competition. We refer to it as one rotation over a particular inch of barrel. A longer barrel has a slower twist rate and provides more power and accuracy, which is better for long-range targets. Sign up for our newsletter to receive updates and exclusive offers, Copyright 2023- Ballistic Advantage - All Rights Reserved. Yeah, I lose some velocity for supers in an 8. Hunting, home defense, and competition style shooting, the .300 AAC Blackout does it all. Ask Foghorn: What Barrel Length for a 300 AAC Blackout Rifle? The 115 gr (7.5 g) 6.8-round has a higher muzzle energy of 1,694 ftlb (2,297 J) due to its greater velocity, while the 125 gr (8.1 g) 300 BLK round has a muzzle energy of 1,360 ftlb (1,840 J). 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). Hunting Capability: 300 BLK conforms to state hunting regulations which may require a cartridge larger than .22 caliber. However, for the best results, we suggest that you use recommended hunting ammunition variants of the .300 Blackout, like the 125-135 grain range. If you didnt before, you can now easily see there are many factors to consider when selecting the best barrel length for your .300 BLK rifle and determine the effective range of the caliber. Let's find out! The .300 Whisper developed by J.D. You forgot one thing in your calculation powder quantity. I have a Sig red dot on my 556 upper and a 4-1240 Bushnell scope on my 300. or youll solve them. Tyler Krenzel, While the AR-10 has been around for decades, there, *Competitive Shooter of the Week* Cartridge Overall Length: 2.02 inches. For 5.56 NATO, that point is 20 of barrel. Eventually, they got their own 300 Blackout cartridge SAAMI approved in 2011. Since the 300 BLK stuffs a larger bullet into a cut down .223 case (which doesnt hold all that much powder to begin with), you have less powder to play with and thus dont need as much barrel. I reckon most of us can read between the lines on that. Getting away with it because they had deeper pockets (costs a lot to get SAAMI cert) and Remington Defense backing. 2. Lack of wind drift alone is a decided advantage, along with a flatter trajectory. The muzzle velocity used for 5.56 in the chart is with a 16 barrel, but the 300 BLK is using a 10 barrel. And now for the killer..I dumped ALL my 5.56 stuff, all of it including the progressive press set up just for it, and went full in on 300 BLK. These days, #1 on my list, especially for new silencer owners, is the Liberty Mystic-X. I hope it will post. 300BLK vs. 7.62x39? A 20 inch barrel will not hinder you with your AAC. My .308 and my 300 BLK are both capable of pushing the same size bullet, but the .308 has way more space in the case for powder than does the 300 BLK. WebSince 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. We refer to it as one rotation over a particular inch of barrel. 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. Although the 300 Blackouts effective range depends on the shooter and application, the chart above provides rough guidelines for consideration. 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; The 6.5 Grendel is a lower to mid-power 26 caliber cartridge. To counter this, of course, there is always the option of sticking a silencer onto the muzzle. Let your fellow shooters know share this article using the Facebook, However, even worse for accuracy is the projectile slowing from supersonic to subsonic velocity. The SDN just doesnt silence 300 Black very well. Remington Defense was part of the effort, which was no easy task because it included a requirement that it run in standard AR-15 magazines. But for hunters using a bolt gun, there are any number of tried and true options, such as the 7.6239, .30-30, and, of course, the .308 Winchester (7.6251 NATO). They think its Fudd ammo. Niche it may be, but it is exceptionally useful in that niche. The Sporting Arms and Ammunition Manufacturers Institute (SAAMI) approved and published industry standards and specifications for the .300 BLK on Jan. 17, 2011. Have had a LOT of different ARs including a Colt upper in 7.6239 that I killed my first deer with! This is because the latter is thicker and wider, causing more drag as a projectile. There is no real difference in muzzle blast from either, both rifles use identical Surefire brakes. This type of software isnt free, but as a one-time purchase its probably the best reloading tool you can get for the price and pays for itself quickly given the price of reloading components youll save. For the best experience on our site, be sure to turn on Javascript in your browser. 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. As the .30-Cal cartridge of choice for the AR15 platform, the 300 AAC Blackout, also known as 300 BLK, has become quite popular with black rifle owners. The more we all know, the better organized and stronger the shooting and hunting community will be. The 300 Blackouts sleeker bullet has a higher. I dont think you can get there in 9 inches with full-size powder loads regardless of how fast-burning they are. Suppressor-Friendly: You can shoot heavier bullets subsonic. We are not only talking about powder burn, but the pressure created by the expanding gasses of the powder. 300 Blackout SAAMI Cartridge Specification. From there it really degrades. I think you still have cut the barrel down if you want a shorter barrel. For example, if you shoot the same Hornady Sub-X 190-grain load from a 16-inch barrel, it will drop 33 inches at 200 yards a 14-inch improvement over shooting with a 10-inch barrel. Heavy grain subsonic bullets are barely able to retain true subsonic performance. Granted, revolvers have a barrel / cylinder gap, but that is a separate issue. A 125 gram .300 BLK bullet fired from a 16-inch barrel has an effective range of about 500 yards , while the same ammo shot from a 9-inch barrel has an effective range of about 480 yards. The catch is on a semi auto you may wind up with weirdness around pressure curves. The barrel's length also allows the bullet to stabilize before exiting the muzzle, leading to a flatter trajectory and better accuracy. There is almost NO need to have a barrel longer than 8-9. And of the couple dozen barrels Ive used in builds, only Faxons have given me fits with under-gassing (suspected out of spec gas port). Even so, 1:7 isnt terrible. For varmint hunters, competitors and gun owners practicing at distance, supersonic .300 BLKs are big medicine. Would be really nice to be accurate (reliably hit 12x12 target at 200..maybe 250 yards?) 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. 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. 9 models V Seven 300 AAC Blackout Stainless Match Barrel (8) As Low As (Save Up to $10.00) $359.99 Best Rated. When an object travels faster than the speed of sound and breaks the sound barrier, it generates a sonic boom. 300 Blackouts effective range can stretch quite a bit depending upon your goals. In any case, you need to start by fixing a variable (target velocity, barrel length, cartridge) and go from there. A 125 gram .300 BLK bullet fired from a 16-inch barrel has an effective range of about 500 yards , while the same ammo shot from a 9-inch barrel has an effective range of about 480 yards. AAC .300 BLK AR-15, The Gun Blog. For example, with a 10.5-inch barrel, the .300 Blackout clocks an average velocity of 2200 feet per second. Longer barrels can be more accurate when using fixed sights, because a longer sight radius allows for finer adjustment of aim. WebAt 200 yd (183 m), the 300 BLK drops 2 in (51 mm) lower than the 6.8 SPC, while it drops 30 in (760 mm) lower at 500 yd (457 m). I have a Q Honey Badger Barrel Assembly which is 7 and a Q Trash Panda. There were also efforts to introduce the AK-friendly 7.6239 mm (also .30-caliber) to modern sporting rifles, but many of them ran into the cartridges case geometry challenge, where feeding can become a concern. 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. WebThe bullet drops about 4 inches at 100 yards, 2.5 feet at 200 yards, 8 feet at 300 yards, 18 feet at 400 yards, and 30 feet at 500 yards. For 5.56 NATO, that point is 20 of barrel. Spend the money on a decent upper. Both use AR-15/M4 magazines and cartridge-carrying capacity is identical. If I had an adjustable gas block maybe but in reality I probably need Rifle+2 gas. Best of both worlds. Heavy, slow moving subsonic bullets experience more bullet drop than fast, more aerodynamic bullets. The best barrel length for .300 Blackout depends on how you intend on using your gun. The longer the barrel, the greater the tendency for it to move while firing imparting a POA-POI shift. Products manufactured by 80% Arms carry a lifetime warranty against manufacturing defects. Though its a common report that subsonic ammo isnt remarkably accurate for most users, Ive been very pleased with my Remington 700s performance with 208 AMaxs. While on a 16-inch barrel, it reaches speeds of approximately 2400fps. agreed on this. All the links go to Faxons website. This is not a function of the dimensional cartridge at a top level so much as it is a function of the SPECIFIC loaded cartridge you are using. So heavy a bullet conveys a subsonic muzzle velocity and correspondingly softer report. A bullet also travels less horizontal distances from wind when it is faster. The concept of putting a .30-caliber bullet in a shortened 223 case has been done before, but not as an industry-wide standard that anyone can make products for, royalty-free. Affordable Factory 300 BLK Ammo is Available. There have been a number of Kabooms recorded from 300 BLK rounds fired in a .223 Rem/5.5645 chamber. Shorter barrels do not result in less accuracy. The kissing cousins resemble twins at a distance, but the similarities end at projectile girth. WebThe 300 HAMR 1-11.25, 1-13, or 1-15 twist match grade barrels are optimized for accuracy with 95gr to 150gr bullets from 8 to 20 barrel lengths. Web920K views 3 years ago What barrel length is best for 300BLK AR-15s? Its really hard to find data on accuracy down-range with different lengths and types (prob just go with AAC as they seem well respected, but would really like to find the most accurate nitrided barrel made). As a simple example, shooting Titegroup and Blue Dot out of my SD9VE with a 4 barrel gives almost no meaningful velocity change. 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. Best twist rate for 300 Blackout? Putting a .308-caliber bullet in a .224-diameter barrel is a recipe for disaster. However, heat build up effects point of impact. Fortunately, you dont have to look far. With supersonic rounds for maximum muzzle velocity to subsonic loads that quiet the roar by slowing the pace. WebThe 300-Blackout is a lower-power 30-caliber cartridge. A buddy has a 100yd range in his back yard. Versions include FMJ, with or without boattails, open tip match or open tip flat base and cartridges with Hornadys SST V-Max, Sub-X or hollow points. Results are in inches/foot-pounds of energy and based on a 100-yard zero with the scope 1.5 inches above the bore. The accuracy of a .300 Blackout barrel will depend on the exact round and barrel length you use. (function() { Since suppressors are verboten in CA, I shoot 120g supersonic. Nine inches of barrel will give you the perfect balance of light weight and velocity with the 300 BLK cartridge. Our initial research data covered the relationship between barrel length and velocity for some 13 common handgun calibers/cartridges. 125 and 225-gram .300 ammo fired from both barrel lengths can travel 100 yards without dropping. At a mere 200 yards with a 100 zero, the 300 Blackout drops nearly 5.5 inches more than the 5.56, at 300 yards it drops a whopping 19-inches more.
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