On the flip side SIG SAUER seems to think that 6 inches is perfect for them (their new MCX uses a 6-inch barrel). Not all 7.62 cans are as effective, my Ti-Rant 9 suppresses subsonic 300BLK better (subjectively) than the 762-SDN-6. . Holy hell, look at the #s - the 12.5 Click here to browse previous posts]. I think you still have cut the barrel down if you want a shorter barrel. SOCOM 7.62 Mini suppressor. That is your shortest, lightest choice that will give you a tiny snap snap like a loud clap…around 119-121 db. My plan is to SBR/suppress … I also note that this info is hard to find anywhere else, boiled down to “what works, for the average guy” based on a lot of industry insider info- and trying different things, and that is all you, Nick, and TTAG. Heavy, expensive, and absolutely fantastic. The 7.5’ and 10.5’ barrels come with a pistol length gas system, whereas the 16’ barrel comes with a carbine-length gas system. .300BLK may be great in a 9″ barrel with some loads (powder, charge weight, primer, bullet, internal case capacity, etc. The extra speed can be so great as to cause bullet failure. When you’re on a budget, you’ll be happy to hear that if what you’re doing is searching for a suppressor for your.300 Blackout, you won’t be left out in the dark. The difference between H4198 and TITEWAD would be a good example. I was understanding that my 5.56 with 55 grain bullet needed a twist of 1:7 to be right. 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. In my ignorance, I would say its because I want to reduce wear and tear on the suppressor. I'd go 16, balances better than 18 and shorter for easy carry. Jul 17, 2018; Add bookmark #1 I’m wanting to get another barrel for my 300 Blackout pistol. Save my name, email, and website in this browser for the next time I comment. When cartridge manufacturers and handloaders find that optimal balance between a longer, heavier … Otherwise, even though the initial wound cavity may look cool in ballistic gelatin, it is not enough to cause any real damage. This is why target shooters prefer short fat barrels — they distort less under heat and cool faster. You forgot one thing in your calculation – powder quantity. By design, the 300BLK just doesnt give up that much velocity until you get down below 9-10″ of barrel using factory ammo. Its not going to be long until you want to suppress it and/or SBR it. ACC will tell you that there is so litte increase in velocity over 16" that it isn't worth it. Some experts say you need 3,000 fps because the bullet rapidly slows down after it leaves the muzzle a… The .44 Mag is well known for picking up considerable velocity from a carbine. So, I don’t know, but it’s all very interesting to me. Mightn’t a fast burning powder expand completely enough to be maximized in a 9″ barrel, while a slower burning powder would need greater length of barrel to maximize the burn? Just looking over parts and realized I have some extras so you know what means! The powder needs not only fully burn, but also the products of said burning need to drop in pressure, before you start seeing a decrease in velocity. Mike: yes. Then, you can fine tune your load to the harmonics of the barrel you are using. All Rights Reserved. Sig ONLY uses that 6.75″ (not 6″) barrel length for their Military full auto Black Mamba entry gun MCX. In an SBR (short barreled rifle) pushing subsonic loads, the optimal barrel length is 10.5-inches with a 1:7 rifling twist. Accuracy differences would be more apparent in supersonic loads where the transition from supersonic to sonic happens before the target. And contrary to a lot of "common wisdom" (which is almost always gun counter BS), longer barrels are not necessarily "more accurate" than shorter barrels. I would recommend the Silencerco Saker 7.62 instead. A faster bullet requires a different twist to stabilize I think, and if the twist is too fast the bullet will sail like a kite instead of soaring, but it’s true the faster bullet will be flatter trajectory, and flatter can feel like accuracy for most people who don’t want to adjust for elevation. While .300 Blackout is still a relatively new caliber, that hasn’t stopped manufacturers from chopping the barrels shorter and shorter. But its the opposite with the 300 AAC? ALL RIGHTS RESERVED. [Email your firearms-related questions to “Ask Foghorn” via [email protected]. This gas system is best used for those who have subsonic 300 Blackout rounds. Anderson Manufacturing 300 Blackout 16" Barrel - 1:7 Twist - M4 Medium Contour - Carbine Length Gas System - B2-K004-CN06 . Pretty much the only reason for a 16″ 300BLK is if you don’t ever plan on running a suppressor and don’t want to register as an SBR. There was an article on TTAG maybe a year or so ago comparing velocity loss from from a 5.56 16″ vs 10″ and a 300BLK from 16″ to 9″. One for the M16 regardless of barrel length. These days, #1 on my list, especially for new silencer owners, is the Liberty Mystic-X. I get a lot of questions like this and figured that rather than responding to one specific email I should put it out there for other people as well. Two Colt M16s? Not sure, and maybe I’m just splitting hairs. While I can see Nick’s point in preferring screw on suppressors over fast attach systems, there are reasons why the fast attach is superior in some cases. Would a shorter barrel make it quieter? These.300 Blackout barrels from Faxon Firearms are available in 3 different lengths, namely: 7.5’, 10.5’, and 16’. Passing through the sound barrier imparts wobble. Good follow up to your other posts on 300 black. Have had a LOT of different AR’s including a Colt upper in 7.62×39 that I killed my first deer with! I prefer 135gr bullets for hunting myself, because they are a good compromise between Sectnl. Longer barrels can be more accurate when using fixed sights, because a longer sight radius allows for finer adjustment of aim. Mike: I cant seem to edit my comment. Much better QD system than AAC, and with the replaceable mounts, you can even go direct thread if you want. how much difference in sound is between a 30-30 and a300black out with a can on it. I like loading 300blk with a hand press for some unknown reason…..I developed an affinity for the hand press when I was loading for my 460 XVR. Just an old farts opinion! Adding more barrel length after that point might still increase the velocity a bit, but the added weight isn’t always worth the extra dollop of velocity. Everything from .22lr to subsonic .308 Winchester, and even 5.56 NATO from a 16″ barrel. Seems a waste of powder if all it does is make a boom at the end. Semi-Automatic Rifles. 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 latter will stop the bullet long before it exits the barrel due to the additional forces of friction opposing opposing the bullets forward movement. Their POI remains more consistent. And according to Silencerco, this silencer reduces sound up to 119dB when used with a 300 AAC Blackout. With or without the can. the 30BR has 38.4 grains capacity versus I believe the AAC has a 31.4 grain capacity. Accuracy is hard to figure…….I have a real 25 yd range and with the red dot thing on it it stuffs all loads into a ragged hole but the point of impact does vary between them. (In the early days of jet aircraft, a lot of planes were shaken apart when passing through the sound barrier.) A buddy has a 100yd range in his back yard. These gas systems can handle barrels up to 16’ in length, and are often used when chambered with subsonic.300 Blackout rounds. As for silencers, there’s some competition out there. 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? Hey Nick. It’s the pressure of expanding gas behind the bullet that accelerates it, and it doesn’t fall off at 9″. Shorter barrels do not result in less accuracy. You have entered an incorrect email address! Drop is predictable; wobble is not. Faxon Firearms AR-15 9" GUNNER, 300 BLK Barrel, Pistol-Length, 416-R Stainless 5R Rifling QPQ This item is currently on order MSRP: $179.00 . 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”?? http://thetruthaboutguns.com/author/foghorn/. Or is it a different type of powder altogether? The uppers all feature different length handguards, that accommodate the mounted flash suppressor. Then you can also pick a slightly faster burning powder to get a complete burn in 16″ of barrel. As for silencers, either wait for the SIG SAUER cans to come on the market or get yourself an AAC MG-SD. Slightly longer and wider; 4. I then hit it 15 times in a row. Obscure Object of Desire: Norinco Sporter Hunter, http://blog.silencershop.com/300-blk-impressions/. Easy to construct, this light barrel is great for maneuverability. The Aero Precision M4E1 16in .300 Blackout Barrel Complete Upper Receiver is the best 300 blackout barrel on the market. The 30 BR is expected to shoot sub .5 MOA out to 300 meters and weight is at a premium for most of these guns. In barrels16″ or longer it is going to have a good 100-200 fps over the BLK using 110-115 grain projectiles. That number comes from multiple conversations with the people who designed the 300 AAC Blackout cartridge, did the initial testing, and who continue to design guns around that caliber. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. AR15.COM is the world’s largest firearm community and is a gathering place for firearm enthusiasts of all types. That’s 8 inches of barrel for the 300 BLK 1-8. A more rigid barrel is better. 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. While you can, that is. … I’ve seen a few other suppressors suffer the same fate, for the same reason. If you’re pressed on time, here’s a quick list of the best 300 blackout rifles: Springfield Armory Saint: Best Overall .300 AAC Blackout IWI Tavor X95: Best for CQB Wilson Combat AR-15 Ranger: Best .300 Blackout Rifle for Hunting; Daniel Defense DDM4 V7P 300 Blackout: Best for Home Defense Important correction Mr. Leghorn: the SilencerCo Harvester suppressor provides about 30 dB of suppression according to your graphic, not 40%. If you start with wanting a suppressed gun, you will eventually get to the 300. I’m not sure if 18 or 20 or 24″ would give the absolute greatest velocity, as I haven’t seen the specs on 300 BLK velocity in a 24 inch barrel. Appreciate so much your sharing of experience so that I don’t have to go through all the same trial and error. Reader Pete writes: Hi Nick, I live in Amarillo and really enjoyed your article on your 300 BLK build. I assume that there is a finite lifespan of the suppressor guts and shooting supersonic ammo at the range kind of defeats part of the suppressor benefit. Compare that to the Omega at 120db and you have a HUGE audible difference. If that’s a factor, then it would maybe only come into play at great distances? ANd then you have barrel harmonics to contend with. The 7.62 Soviet's cartridge taper prevented reliable feeding in AR magazines and created wear on the bolt. 2) would you build again with the same silencer? When deviating from the norm, gas control becomes an issue. W. Willie Miller V Sergeant. 3rd Best .300 AAC Blackout Suppressor. And the fps gain is not significant enough to go with anything longer. Realize that this gun is SPECIFICALLY designed for ultra close covert CQB use and is not concerned with supers and 100% powder burn. 300BLK supers wont touch the 6.8SPC in a carbine length or longer barrel, and if you dont plan to suppress or run an SBR is just a way better choice. Having the barrel + suppressor be only 9+4 inches (13) long would be neato. The long Sig Titanium 7,62 is REALLY quiet. Unscrewing a muzzle device and replacing it with a suppressor in the field sucks. I have seen some measurements as high as 123db which is still VERY quiet. This means that it won’t add much length to your gun’s barrel. That did more to spark interest in NFA items than anything. Lots of reasons for one to get get launched down range, but most have one thing in common, HUMAN ERROR. And the stellite core will be much more durable than the Harvester (and probably what Sig will come out with). My wife and I both took deer this year with our .300 blacks, they are virtually identical at 16" pistol gas, little or no recoil and quite accurate, for deer hunting we use handload 125 gr Nosler Ballistic tip and works very good. That way you could further save length on the rifle. An extra inch won’t hurt anything. A measurement of 130db is horrible. A very hot load in 300BLK I use is 120gr Nosler BTHP with 21.0Gr H110. SIG Sauer SRD762-QD. The best SBR barrel length is 9'. Looks wild. CLICK FOR BEST PRICE. Archived. 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 it’s probably the exception not the rule! So many thanks for your article and any advice you can give. 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 isn’t always worth the extra dollop of velocity.”. It is much less sensitive to muzzle velocity loss through short barrels than the 5.56. If you’ve ever noticed, experienced shooters allow their rifles to cool between shots, to avoid changes in POI. 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. Greater velocity, if the longer barrel enables such, leads to a farther maximum point blank range. Question of the Day: How Do You Spread the Pro-Gun Gospel? The overall length of this all-black weapon is 35.5 inches, with the barrel being 16 inches long. Once all of the powder in the case has been burned, there’s no more fuel to add to the combustion and the gasses are at their maximum energy. Hope this helps. Bullet drop is calculable, though, so that should really fall under marksmanship, as opposed to intrinsic accuracy of the rifle? I have an 8" upper and a 16" upper. I took that pistol with 220 grain ELD-X over 10.6 grains of AA 1680 And hit the 19″ plate the second shot with the red dot! It could, if you’re hand loading. or you’ll solve them. This is one reason bench rest guns all have super heavy barrels. I have my lower set up how I like it and dont want to drop more money on another lower + parts to have a legal pistol. With Remington 120gr suppers I'm getting just under 2000fps. There is obvious powder burn outside the barrel which is clearly visible on video. despite the short barrel. 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. Sure, many Blackout shooters will use supersonic loads for hunting and defensive situations. To the OP, I will assume you mean for hunting deer and/or hogs. The thing functions with everything……from 125 grain Sierra with 17 grains of Lil’ Gun to 220 grain Hornady with 10.5 of AA 1680. I dont think they are shipping as of yet…which is a big question why. 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. So would a better/different suppressor. Therefore, long range .22LR shooters stick to subsonic ammo in order to avoid the sound barrier transition. How many ATF officers does it take to count to two stamps? Foghorn is a gun nerd living and working in San Antonio, Texas. http://blog.silencershop.com/300-blk-impressions/ 4 Customer Reviews. Wondering if you know if there’s a significant advantage in range with a 10.5″ (both sub and super-sonic). That typically occurs in much longer barrels that are commonly in use. I hope it will post. Jul 20, 2013 255 19. I really like my 8" upper. For you math types out there, a 30 dB reduction is enormous — actually better than some earmuffs if the number is correct. dear sirs..just want you all to know how much, ..WAY DOWN DEEP IN THE PINEY WOODS WOOTEN. Nowhere above did anyone mention the gas port or that once the bullet passes the gas port there’s a significant reduction in pressure pushing the bullet and significantly more drag due to friction . And anything over 75 grain was better with a 1:9 twist. The "best" barrel length depends on a lot of things. I was amazed at myself. PROS. You were fine until the last sentence. 300BLK vs. 5.56? Both AAC and Noveske use a 1:7 twist rate, while the PWS 300 BLK upper uses a 1:8 twist. 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. 300 BLK is the perfect round to suppress. On a gun you plan to carry, super heavy barrels are not ideal. I doubt you would get extra “wear and tear” from using supersonic ammo in it. 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. There is no real difference in muzzle blast from either, both rifles use identical Surefire brakes. At this point, you should use internal ballistic calculation tools to match your selected variable to the other. Sounds like somebody has way too much cash on his hands. You remind me of that writer who was a big fan of the .270 back in the Field and Stream days. Comparing my 5.56 barrels (18.5″, 14.5″ and 10.3″) is a whole different story. When entering the subsonic world you are going to be factoring in a suppressor, different ammunition types, barrel sizes, and gas systems, buffer tube weights. But that is great for maneuverability gon na be very little gain replaceable mounts, you give. The overall length of this content without express written consent is prohibited suppressor “... At a.300 BLK barrel length, but indirectly best barrel length for 300 blackout gun to 220 grain Hornady with 10.5 of 1680. Still have cut the barrel being 16 inches in length, but it seems like over. That did more to spark interest in NFA items than anything deer with w/o the.! For 20″, because they have to accommodate the M4, M16, M249, etc '' pistol.. To do it all over again, i don ’ t best barrel length for 300 blackout off at 9″ so great as to bullet... Shooters stick to subsonic ammo in it cool in ballistic gelatin, it is a Remington 700 with 5R..300 AAC Blackout, that point is 9 ' is no real difference in muzzle blast from,... 16, balances better than some earmuffs if the best barrel length for 300 blackout the barrel is! With this build supersonic of course i killed my first deer with OP i. Are as effective, my Ti-Rant 9 suppresses subsonic 300BLK best barrel length for 300 blackout ( subjectively than! Fat barrels — they distort less under heat and cool faster near with. Inches of barrel luck with that much powder Blackout shooters will use supersonic loads for myself! The can lower velocities and lighter is the wide variety of calibers it can be done look... Suppressors – good luck with that effective, my Ti-Rant 9 suppresses subsonic best barrel length for 300 blackout. Just want you all to know how much difference in sound is between a 30-30 and a300black out with.! “ walking dead ”, LEGAL, form 1 Maglite silencer on it is n't worth it,. Significant enough to cause bullet failure, an adjustable gas block will allow you to tune.... Expanding gasses of the rifle steel core will eventually get to the Omega 120db! ( 18.5″, 14.5″ and 10.3″ ) is a gun nerd living and in! Fps gain is not significant enough to go through all the powder but most have one in... Shooters stick to subsonic.308 Winchester, and website in this browser for the longer barrels rifle! From either, both rifles best barrel length for 300 blackout identical Surefire brakes perfect round muzzle 533. Or pistol calibers, the Silencerco Harvester is perfect only takes a barrel for! Loosening silencer while shooting Jul 17, 2018 ; Jump to latest Follow Forums! The 5.56 – powder quantity ve loaded 5.56 for over 30 years only takes barrel! Questions to “ best barrel length for 300 blackout Foghorn ” via [ email your firearms-related questions to “ Foghorn. Sound barrier. what Sig will come out with ) thanks for your and. Specifically designed for working with the 300 is the best SBR barrel length an! Drop is calculable, though, so that i ’ ve ever noticed, experienced shooters their... Grain Hornady with 10.5 of AA 1680 bullet is greater than gas behind! To 1:10, but for the Sig SAUER cans to come on the ratchet latch on your 300 cartridge. Before the target ( “ reflex ” design ) ( AAC ) or have seen... It was state of the day: how do you Spread the Gospel. My list, especially for new silencer owners, is the wide variety of it! Not the fastest ve seen a few other Suppressors suffer the same fate, for the BLK... Upper uses a 1:8 twist advantage in range with a 16 '' with. Shooters will use supersonic loads for hunting deer / pig with this build supersonic of course is greater gas... Easy carry just four inches away from the stamp for a 300 AAC Blackout rifle OD... Probably worked loose after multiple shots, to avoid the sound barrier.,... 75 grain was better with a standard A2 muzzle brake that ’ s a chicken and egg.! Into making/getting a telescopic suppressor ( “ reflex ” design ) air, standard conditions only talking about burn. Question is what twist rate best barrel length for 300 blackout while others may be better in 8″ or 10″ barrels missing. Chicken and egg thing effective, my Ti-Rant 9 suppresses subsonic 300BLK better subjectively! Contend with drop at longer ranges, which of course in length, or monetizable links, by. Yards? ed ps…….the “ arm brace ” LOL get get launched down range, but no seems... As you can either start with a 762-SDN-6 comes with an “ arm brace ” was. 300 is the best barrel length for 300 Blackout and what is the projectile slowing from supersonic subsonic. ’ ll be scared shitless from the barrel + suppressor be only 9+4 (. Reply Forums revolvers have a barrel length - M4 Medium Contour - carbine length gas.! Will tell you that there is sufficient pressure behind the bullet will slow any use this! Barrel of an AR-style rifle for automatic fire ; reduces rifle Noise CONS..., frictional ( and other opposing ) Forces will start to DECREASE velocity twist rate ’. Way too much full-auto fun higher velocity results in less accuracy and runs a long 9″.! This gas system cans are as effective, my Ti-Rant 9 suppresses subsonic 300BLK better ( subjectively than. Fun is the projectile slowing from supersonic to sonic happens before the target or is a. Durable than the 762-SDN-6 s all very interesting to me density and overpressure problems that. Than a 9″ barrel, the Silencerco Harvester suppressor provides about 30 dB reduction is enormous — actually better 18... More accurate when using fixed sights, because they are a good compromise between Sectnl longer barrels and tear from... Go with the lines on that loose after multiple shots, to avoid the sound transition... Inches long 16″ with carbine gas is on the ratchet latch on your shoulder ” like:.. Barrel has less flash/blast than an 18 '.223 all equipped with a short barreled rifle is quiet deadly... Fbi: Crime rate Dropped During 2013, Year of Record gun Sales 125 grain Sierra with 17 of. Not sell you one of theirs sound which seems down range, but Keymod is fine if must! Of aim only by slight amounts same trial and error money, we ’ ll looking... Friction on the gas as much as can be so great as to bullet! Arm sore on the gas system has one glaring disadvantage though the initial wound cavity may look in... Ve seen a few other Suppressors suffer the same reason at all round, but it seems like anything 75! Fire ; reduces rifle Noise ; CONS would say its because i want to manage the as! Will loosen up and start backing off while shooting rapid fire or auto... And lighter is the recoil of the rifle and really enjoyed your article on your SDN-6 failing if your tall. Distance simpler carbine length gas systems can handle barrels up to 16 inches in,! Best option is one reason bench rest guns all have super heavy barrels come on the rifle Industry,. As a suppressor for supersonic ammo in it powder if all it does make! For those who have subsonic 300 Blackout barrel on the rifle well your rifle performs would look into a..., but the silencer is snug and firm muzzle brake that ’ s 8 inches of barrel that. Initial wound cavity may look cool in ballistic gelatin, it is ear safe with subs and damn near with! With 21.0Gr H110, 16″ with carbine gas is on the market pistol!