AAC didnt develop a damned thing. What happened to it will fire from any AR-15 you might have doesnt appear to be the case since now you say a 9 barrel is optimal but which would require an SBR $200 stamp, you may need an adjustable gas block to handle over gassing & shoot subsonic and then theres the ammo is twice the cost what I pay for my 556 rounds.. My interest in building a 300 AAC for hog hunting that I could just slap in my upper is quickly deteriorating, especially since the gun may not even cycle without, additional hardware if you want to what was promised, which is shoot both supersonic and supersonic through a stock 16 barrel. Its a 30 second swap from 300blk to .556 However, a 20+ inches barrel may be too unwieldy and impractical for anything but target shooting. I want to get a barrel and file a form1 but just havent yet. 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. Jones design of .300 Whisper, gave it an ever so minor redesign, renamed it, and submitted it to SAAMI for certification. Thats the one, and only reason Im so anal about checking mine on the range, or in the field. Nine inches of barrel will give you the perfect balance of light weight and velocity with the 300 BLK cartridge. It too functions with all loads I have. _gaq.push(['_setAccount', 'UA-6323545-2']); In a 16-inch barrel, .300 Blackout ammunition gets impressive velocity and accuracy, allowing you to hit targets over 150 yards away. OUR GST-9 IS UNAFFECTED BY THE LATEST 12/28 ATF CLARIFICATION LETTER & SHIPS IN 3 DAYS! Converting an AR-15 to fire 300 Blackout is as simple as swapping its barrel. In instances where that is not an option, however, you can always go long or brace yourself for those loud blasts with every shot. The .300 BLK bullets are 0.30 inch in diameter (7.62 mm) and the .223 Rem (5.56 mm) is 0.224 inch. This compatibility means that it can allow for major savings if you're a gun enthusiast who likes to stay on a budget. A 5.56 and a .308 will do everything you need it to do. However, the 300 Blackouts heavier bullet compensates for its lesser speed to grant it an effective muzzle energy, and its 0.84 greater diameter enables it to inflict a wider wound channel. Most AR-15 upper 300 Blackout rifles feature the 1:7 and 1:8 twist rate, which is the rifle barrels spin rate. On the flip side, having a shorter barrel allows for easier close-combat shooting, which would otherwise be a challenge if you had a nine-inch barrel. 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. It could, if youre hand loading. how much difference in sound is between a 30-30 and a300black out with a can on it. anyone have a good reliable source for ballistics of the most commonly commercially available and popular 300 blackout roundish relation to barrel length and rifling? Web5 models Noveske Lo-Pro Gas Block 300 AAC Blackout Barrel (1) As Low As (Save Up to 14%) $351.50 Final Sale. The last thing you ever want is a loosening silencer while shooting rapid fire or full auto. Mine has a 10. The twist rate is when the bullet twists within a barrel once fired, which helps keep it at a high velocity and helps maintain accuracy. 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. 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. I do anticipate hunting deer / pig with this build supersonic of course. The muzzle velocity used for 5.56 in the chart is with a 16 barrel, but the 300 BLK is using a 10 barrel. Here is the old barrel length again Longer barrels have been proven to have better velocities and it depends on your burn rate on your powder whether you get the full use of your barrel. This high-speed feature means that the bullet will spend relatively less time in motion and thus less prone to the effects of elements like the wind. Most bullets from both cartridges weigh around 125-Grains. A longer barrel has a slower twist rate and provides more power and accuracy, which is better for long-range targets. Preparing for 300 BLK upper build and have further questions: I want to use both sub and supersonic ammunition and am a reloader so leaning toward the 1/8 twist to take advantage of the calibures flexibility. For .22LR, for instance, the optimum length is 16. For hunting expeditions or other long-range requirements, the .300 AAC Blackout has a maximum effective range of approximately 460 meters. One has operated perfectly right out of the box. 3. Part of that equation is the use of subsonic loads with heavy bullets and powder that burns completely in that abbreviated barrel. Both use AR-15/M4 magazines and cartridge-carrying capacity is identical. At 16 inches, .300 Blackout barrel muzzle velocity is close to its peak, giving you a powerful weapon for making accurate long-range shots. Appreciate so much your sharing of experience so that I dont have to go through all the same trial and error. Some folks wonder why consider a 300 BLK? Thats 8 inches of barrel for the 300 BLK 1-8. Bullets make a similar noise, although not nearly as earth rumbling, that is very recognizable and isnt always advantageous in combat. Contact our team at 80 Percent Arms to learn more. Could you comment further on the ratchet latch on your SDN-6 failing? If I had an adjustable gas block maybe but in reality I probably need Rifle+2 gas. Yes, there are loads that can use longer barrels, but you need to have a specific goal in mind before there is a large benefit in this caliber. 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). Short-barreled rifles come highly recommended for home defense because the compactness makes the weapon easy to wield within the walled and close quarters of a home. (That was a mistake Ill rectify next barrel probably.). Subsonic .300 Blackout rounds fix this problem by traveling slower than the speed of sound. Will the gun be a 'do it all' for long-range or short-range shots? It didnt take long for engineers at two of the industrys finest to solve the problem, though. Ballistically, the .300 AAC Blackout has almost 17% more energy at 300 meters than the 7.62 x 39 round. What happened to the big appeal of the 300 AAC for the average guy when this round was first released, which was you can put it on any AR-15 upper you have and go shooting?? The 300 BLK shoots .308 caliber bullets. PWS is as close as you can get right now. 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. There is obvious powder burn outside the barrel which is clearly visible on video. As for silencers, either wait for the SIG SAUER cans to come on the market or get yourself an AAC MG-SD. This gives more energy on target, a flatter trajectory and less wind drift. The .300 Blackout also comes in a supersonic variant, which means once fired, the bullet travels faster than the sound barrier. Thats 8 inches of barrel for the 300 BLK 1-8. For longer range engagements with a suppressed 300 Blackout, use a 16 barrel with a suppressor for an average velocity of over 2,630 fps, leading to more effective shots and minimal bullet drop. For example, a 1:8 twist is best for lightweight supersonic rounds, while the 1:7 twist is recommended for heavy subsonic rounds with a suppressor. Ammo can be found locally. Buy a .308 from a legit company and save yourself headaches. Wideners offers a variety of loads, in bullet weights that vary from 110- to 220-grains. Speared on by no issues I built a 10.5 inch pistol with an arm brace LOL. 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. 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 other had an issue with the gas block; I contacted PSA and they immediately fixed it at no charge and with no questions, and it also has run perfectly since then. 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 300 AAC Blackout was created by Advanced Armament Corp. and Remington primarily for the military as a way to shoot .30-caliber bullets from the M4/AR15 platform while using standard 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). However, since a suppressor adds to the length of your gun, you dont want to add a suppressor and make your gun long and clumsy. Your muzzle choice should also be in consideration of the flash produced and the muzzle rise with every shot. Hi Lance, well I thought like you did, stick it on and go but being a dumb old guy I did not bother to research much. At 16-inches, muzzle velocities are near their peak. That coupled with your complaints is why. I came here for a clue about what barrel to get for a pistol build, but I know once I have it Im going to want a real stock and a suppressor. They are flatter shooting and, with less time in flight, less prone to the effects of wind. Shorter barrels do not result in less accuracy. This is actually much tighter twist required to stabilize the short 124gn. The 300 Blackout is frequently available with 200 and 220 grain bullets. With a 1-7 twist rate, for instance, it means that the bullet will be spun once over 7 inches of rifling. For 300 AAC Blackout, that point is 9 inches of barrel. The barrel should also deliver enough bullet velocity to hit far-off prey with deadly impact. As for silencers, theres some competition out there. Spend the money on a decent upper. I was understanding that my 5.56 with 55 grain bullet needed a twist of 1:7 to be right. Sure, you could just leave the suppressor attached, but Id rather not have it see the wear and tear if it doesnt need to. This is why target shooters prefer short fat barrels they distort less under heat and cool faster. All the links go to Faxons website. It seemed to work OK for all those years. Ask Foghorn: What Barrel Length for a 300 AAC Blackout Rifle? At 16 inches, muzzle velocities are near their maximum. 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. Notify me of follow-up comments by email. I was at first considering a 9" barrel with a 1:7 rifling, for that is what the cartridge was designed around. Factory Starline and SIG produced 300 HAMR cases are available, but cases can be made from common and available 5.56/.223 cases. Built for use with suppressors but still maintaining subsonic speeds, the .300 Blackout is designed to penetrate heavy barriers while still maintaining an overall manageable weight profile. This .30-caliber bullet at 500 yards drops by less than 9 feet (21 less than the subsonic version) and it carries 362-foot-pounds of energy there. 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. QA/QD systems may add more tolerance stacking and complexity, but the silencer is snug and firm. The longer the barrel, the greater the tendency for it to move while firing imparting a POA-POI shift. 1) Barrel length? The accuracy of a .300 Blackout barrel will depend on the exact round and barrel length you use. 110gr Barnes VOR-TX. Ive had no problems with PSAs Cust Service. This issue isnt unique to 300 Blackout bullets, though. Or is it a different type of powder altogether? WebThey found the optimal barrel length for 300 BLK is between 9" and 11.5". The 300 AAC Blackout definitely works for hunters who want to use their AR15-platform rifle. Dumb question- How many stamps would an M16 with a short barrel and a suppressor require? The. Any 2015 announcement would probably not hit shelves until 2017 and then figure the ATF wait and you are probably going to need to wait until 2018 to get your suppressor. The build kit comes with well-documented manual instructions for putting together the firearm, along with well-labeled parts, which are all individually packaged. With or without the can. A 9" barrel will allow any 300 BLK cartridge to reach optimal velocity, while an 11.5" barrel will provide a bit more accuracy and stability if you plan on shooting mostly supersonic loads. My friend bought a 300 Blackout upper from PSA and put a can on it. If you're looking for a multi-purpose load for the .300 AAC Blackout, this may be the best bullet. There is no real difference in muzzle blast from either, both rifles use identical Surefire brakes. Ive not shot it w/o the can. Yeah, I lose some velocity for supers in an 8. 4. A look at 300 Blackout ballistics including velocity, energy and drop data for some of the most popular loads among American shooters. They result in less range and more bullet drop at distance. 9 models V Seven 300 AAC Blackout Stainless Match Barrel (8) As Low As (Save Up to $10.00) $359.99 Best Rated. Drop is predictable; wobble is not. Tyler Krenzel, While the AR-10 has been around for decades, there, *Competitive Shooter of the Week* In matters of velocity comparison, different barrel lengths for the .300 Blackout sit within the 25-50 feet per second per barrel velocity rule that governs most firearms. A subsonic 300 Blackout round produces comparatively little muzzle flash in addition to a softer report, making it a fine choice for hunting in nighttime and twilight conditions. Niche it may be, but it is exceptionally useful in that niche. Although they share .30 caliber bullets, the 300 Blackout and 308 Win are dissimilar otherwise. Let's find out! When you pair the barrel with .300 Blackout ammo, you get an easy-to-carry gun that spits rounds capable of penetrating heavy barriers. Just an old farts opinion! The 220 grain subsonic .300 Blackout goes at about 1010 feet per second with 500 foot-pounds of muzzle energy. However, heat build up effects point of impact. Avoiding the logistical nightmare that would have been to replace the military's standard issue rifle during an ongoing war, the .300 Blackout was designed to be compatible with the M4 system. Advanced Armament Corporation (AAC) started working on the cartridge in 2009 after a U.S. military organization requested the development of a .30-caliber round capable of running in an M4. A lighter gun via barrel would allow more other things to be used. But there you have it. [Email your firearms-related questions to Ask Foghorn via[emailprotected]. Since its suppressed, the other deer in the area dont seem to mind either.. COPYRIGHT 2021, THETRUTHABOUTGUNS.COM. Factory Starline and SIG produced 300 HAMR cases are available, but cases can be made from common and available 5.56/.223 cases. A 6-inch .300 Blackout barrel is short enough to carry as a concealed weapon, and drawing and aiming the reasonably sized weapon is hassle-free. I dismiss this entire article as slow news day page filler. The 6.5 Grendel is a lower to mid-power 26 caliber cartridge. We will promptly replace or repair any product that we determine to be defective. Selecting the best barrel length for the .300 BLK can be a double-edged sword. While on a 16-inch barrel, it reaches speeds of approximately 2400fps. They designed it for the needs of Special Forces to be real compact (as an Mp-5) and QUIETER than an MP-5. .300 BLK ammo fired from a short barrel can hit targets at 100 yards, which is more than enough range for home defense. ), while others may be better in 8 or 10 barrels. And thanks to the mounting system, you can get multiple end caps to thread it on everything from 1/2 x 28 threaded barrels to H&K 3-lug mounts with a few seconds of twisting. Secondly (and the reason why my second .30 suppressor is fast attach) is that I have multiple firearms that I take to the range and want to be able to quickly switch between them. Your second paragraph is spot on! Both AAC and Noveske use a 1:7 twist rate, while the PWS300 BLK upper uses a 1:8 twist. The barrel also plays a role in the drop rate of the bullet. 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. Looks wild. Longer barrels also screw up the timing, 16 with carbine gas is on the outside fringe of reliable for the 300. It also singes the hair on my knuckles. As such, a subsonic 300 Blackout load makes an ideal accompaniment to a suppressor, suiting it well for (A) tactical situations where ear protection would be impractical, and (B) hunting hogs without scattering the whole pack after the first shot. The .300 Blackout is a worthy firearm since it gives you the ballistic power of an AK just by switching the upper in an AR. You can either start with a barrel length, or a baseline load. Having internal ballistic software to play with is an eye-opener in a lot of ways for example Ill never have a .308 longer than a 20 in. With a relatively convenient recoil, the .300 AAC Blackout is known for giving users an easier time staying on target. So would a better/different suppressor. As weve established, longer barrels deliver the most accuracy and velocity, and the longest .300 Blackout barrel you can get is 16 inches. I have seen some measurements as high as 123db which is still VERY quiet. 300 Blackout SAAMI Cartridge Specification. Cartridge Overall Length: 2.02 inches. 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 always, train with your rifle and make sure you know your intended purpose before you buy. Thats 8 inches of barrel for the 300 BLK 1-8. Planes that increase their velocity until it reaches and exceeds that mark generates a sonic boom. They think its Fudd ammo. I need to get the lathe going as well, and I havent had the time or patience to do it. Our initial research data covered the relationship between barrel length and velocity for some 13 common handgun calibers/cartridges. Passing through the sound barrier imparts wobble. If you want your pistol to have more range, velocity, and accuracy, you can opt for an 8 to 10-inch barrel. The deer Ive taken with my 8 300 BO dont know or care. And the stellite core will be much more durable than the Harvester (and probably what Sig will come out with). Had a few questions for you if youd be so kind as to give me a bit of advice . That is your shortest, lightest choice that will give you a tiny snap snap like a loud claparound 119-121 db. Part of todays confusion over 300 Blackout effective range and barrel length often stems from this flavor. We refer to it as one rotation over a particular inch of barrel. The companies didnt start completely from scratch, though. Greater velocity, if the longer barrel enables such, leads to a farther maximum point blank range. The 16-inch barrel also delivers greater energy on impact regardless of the ammo type. Compared to other ammunition like the 350 Legend, the .300 AAC Blackout is more effective in taking long-range shots. TKS! They lack the mass to carry a proportionate level of energy at downrange, though. For 300 AAC Blackout, that point is 9 inches of barrel. Plus higher velocity typically requires less hold over. Cartridge Overall Length: 2.02 inches. Lets explore all this caliber has to offer including an in-depth look at 300 Blackout Ballistics. 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. 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. If you look up brown recluse or rattlesnake bites on the internet youll be scared shitless from the images. It depends on the intended purpose of the rifle. Copyright Ammotogo.com 2023 All Rights Reserved. This issue isnt unique to 300 Blackout bullets, though. Instead, they built the round from the M4-compatible 5.56mm cartridge. The subsonic capabilities of the 300 BLK make it ideal for use with a suppressed AR. If you're looking for a multi-purpose load for the .300 AAC Blackout, this may be the best bullet. Why would you detach your suppressor for supersonic ammo? Now its a chicken and egg thing. Now the ammo costs too much for a niche rifle caliber. Suppressor-Friendly: You can shoot heavier bullets subsonic. Gun Review: Henry U.S. Cartridge Overall Length: 2.02 inches. For instance, having a relatively long barrel has the gases from the already burned-out gunpowder trapped for longer, which means there will be more push time of the bullet by the gases. With these details in mind, the best .300 Blackout barrel length for hunting is one that can hit long-range targets. Maybe not so much that the longer barrel is directly responsible for greater accuracy, but indirectly? Converting an AR-15 to fire 300 Blackout is as simple as swapping its barrel. So, dont read to much into the issues. WARNING: With some bullet options (and setback during chambering) 300 Blackout rounds will go into a .223 chamber and fire. Its not going to be long until you want to suppress it and/or SBR it. Hope this helps. Nobody shows pics like mine because it was not big dealnothing to talk about. However, for the best results, we suggest that you use recommended hunting ammunition variants of the .300 Blackout, like the 125-135 grain range. Subsonic and supersonic ammo both have features that pair well with a variety of barrel lengths. With a 1-7 twist rate, for instance, it means that the bullet will be spun once over 7 inches of rifling. The .300 BLK bullets are 0.30 inch in diameter (7.62 mm) and the .223 Rem (5.56 mm) is 0.224 inch. the 30BR has 38.4 grains capacity versus I believe the AAC has a 31.4 grain capacity. WebIn matters of velocity comparison, different barrel lengths for the .300 Blackout sit within the 25-50 feet per second per barrel velocity rule that governs most firearms. Heavy, subsonic ammo in a 10-inch barrel experiences low velocities, the tradeoff is the ability to not damage your hearing while using a suppressor. He never got it to run right and put too much money into it. (function() { In the chart, Hornady 110gr G-Max Full Boar (2,350 FPS At Muzzle), Hornady 125gr HP American Gunner (2,175 FPS At Muzzle), Hornady 190gr Sub-X Subsonic (1,050 FPS At Muzzle), *Competitive Shooter of the Week* I think you still have cut the barrel down if you want a shorter barrel. The SAAMI diagram for the 300 BLK is shown below. The 300 AAC Blackout delivers ballistic performance comparable to 7.6239, yet possesses a base diameter that optimizes functionality in an AR-type platform. There is almost NO need to have a barrel longer than 8-9. You have entered an incorrect email address! Since the paperwork and tax didnt kill you, and they already have your fingerprints, youre gonna want to SBR it. Important correction Mr. Leghorn: the SilencerCo Harvester suppressor provides about 30 dB of suppression according to your graphic, not 40%. The SAAMI diagram for the 300 BLK is shown below. Such large projectiles convey a subsonic muzzle velocity that is accompanied by a quiet report. The SAAMI diagram for the 300 BLK is shown below. A fast attach lets me do that. The extra speed can be so great as to cause bullet failure. Affordable Factory 300 BLK Ammo is Available. Using a short-barreled rifle is ideal for home defense as its compactness makes it easier to maneuver throughout the home.

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