var _gaq = _gaq || []; WebThe 300-Blackout is a lower-power 30-caliber cartridge. Spend the money on a decent upper. Thus, proper 300 BLK and .300 Whisper, before it, run with tighter twist barrels. *Calculations are estimates using Hornadys on-line ballistic calculator and adjusted by the companys estimate of between 25 and 35 fps loss per inch of shortened barrel length (30 fps subtracted per inch for the purposes of this chart). The muzzle velocity used for 5.56 in the chart is with a 16 barrel, but the 300 BLK is using a 10 barrel. 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. A 5.56 and a .308 will do everything you need it to do. The stiffer barrel damps harmonics. 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. Though the muzzle rise and recoil forces are not entirely negligible, they are not enough to affect follow-up shots for the shooter. I have 2 Colt M-16s that Im going to convert to 300 Blackout. ANd then you have barrel harmonics to contend with. Another shilling advertisement for Faxon Firearms products. 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. 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 its true the faster bullet will be flatter trajectory, and flatter can feel like accuracy for most people who dont want to adjust for elevation. Notify me of follow-up comments by email. 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. I had a table at the local gun shows for years. Since its suppressed, the other deer in the area dont seem to mind either.. We refer to it as one rotation over a particular inch of barrel. Clickhereto browse previous posts]. Supersonic ammo retains rifle caliber velocities, has increased effective distance, and bullet drop is greatly reduced. This isnt that hard. Cartridge Overall Length: 2.02 inches. 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? Hunting, home defense, and competition style shooting, the .300 AAC Blackout does it all. Standardized with SAAMI (Sporting Arms and Ammunition Manufacturers' Institute) specs means every design aspect of the .300 Blackout is kept similar, regardless of the manufacturer. Higher velocity results in less drop at longer ranges, which of course effects point of impact. 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. So heavy a bullet conveys a subsonic muzzle velocity and correspondingly softer report. Thats 8 inches of barrel for the 300 BLK 1-8. Also, the 300 BLK shoots faster from a 16 barrel than a 9 barrel, particularly with supersonic loads. Have had a LOT of different ARs including a Colt upper in 7.6239 that I killed my first deer with! Much better QD system than AAC, and with the replaceable mounts, you can even go direct thread if you want. They think its Fudd ammo. Share the post "300 Blackout Basics Specs and Cartridge INFO", Tags: .223 Rem, .300 AAC Blackout, 300 BLK, AR15, Lapua Brass, Suppressor. There are a few factors to consider when selecting the ideal barrel length for a 300 BLK rifle and determining its effective range. Supersonic ammo in a 10-inch barrel retains rifle caliber velocities but experiences greater bullet drop at distances. 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. AR-platform rifles optimized to run subsonic 300 Blackout tend to fire supersonic ammo poorly. In large part because of PSAKs being very dangerous garbage until very recently. 1:8 or increasingly, 1:7, especially if you want to stabilize subsonic, LONG bullets at low temperatures. A 20 inch barrel will not hinder you with your AAC. Play around with powders too much handloading and you screw up the timing on the gas system. 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. However, for the best results, we suggest that you use recommended hunting ammunition variants of the .300 Blackout, like the 125-135 grain range. 300 Blackouts effective range can stretch quite a bit depending upon your goals. Although functionally identical to the 300 Whisper, the 300 AAC Blackout is its own SAAMI standardized cartridge. Let's find out! This may possibly be true, but I dont see links to formally derived stats to back up this claim. Matt Gomes -, We've updated our Garand Thumb post to include vid, Sporting Arms and Ammunition Manufacturers Institute, Understanding Different 12-Gauge Shotgun Load Types, 300 Blackout Effective Range & Best Barrel Length, Survival & Backpacking Water Filter Tests, Best 9mm Ammo: Plinking, Training & Home Defense. Dumb question- How many stamps would an M16 with a short barrel and a suppressor require? At 16 inches, .300 Blackout barrel muzzle velocity is close to its peak, giving you a powerful weapon for making accurate long-range shots. Currently they offer a 16 300 Blackout barrel for their MCX. All the links go to Faxons website. You have entered an incorrect email address! So heavy a bullet conveys a subsonic muzzle velocity and correspondingly softer report. For an MG with a sub 16 barrel and a suppressor, you only need two stamps, one for the suppressor and one for the MG. Two. 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. I need you to read this test by The SIlencer Shop that shows the SDN can at an enormous disadvantage when shot with 300 BO subs. That coupled with your complaints is why. The muzzle velocity used for 5.56 in the chart is with a 16 barrel, but the 300 BLK is using a 10 barrel. 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. I dont know how the 30BR compares powder quantity wise to the 300 BLK, but that could account for the difference in barrel length. Dont forget that longer barrel = greater sight distance for iron sights. The .300 Whisper developed by J.D. Besides being powerful and efficient, .300 Blackout rounds are ideal for home defense because they are lethal when fired from short-barreled guns. Exactly what Int19h (?) 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. Any time you put a can on a rifle, an adjustable gas block will allow you to tune it. At this point, you should use internal ballistic calculation tools to match your selected variable to the other. As a result, heavy-grain subsonic bullets struggle to retain their subsonic terminal performance, while supersonic ammo has increased effective range and reduced bullet drop. Factory Starline and SIG produced 300 HAMR cases are available, but cases can be made from common and available 5.56/.223 cases. 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. Best of both worlds. It gives an almost negligible muzzle rise while shooting, meaning most of the energy produced during recoil comes back to the shooter's shoulders. It is much less sensitive to muzzle velocity loss through short barrels than the 5.56. I was understanding that my 5.56 with 55 grain bullet needed a twist of 1:7 to be right. Though there is a lot of talk among gun enthusiasts about the nine-inch sweet spot of barrel length when it comes to the .300 Blackout, the ammo works well with different variations of barrel lengths and uppers. This issue isnt unique to 300 Blackout bullets, though. They can run any barrel length without an additional stamp. Your muzzle choice should also be in consideration of the flash produced and the muzzle rise with every shot. Assuming youre serious about hand-loading, you can purchase internal ballistic software to sort this out from an educated standpoint rather than following rules-of-thumb. This guide takes a closer look at the various barrel lengths for the 300 Blackout round and where to find them. 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. The ability to shoot full auto 300 BLK through an SBR with this can attached is impressive. Reader Pete writes: Hi Nick,I live in Amarillo and really enjoyed your article on your 300 BLK build. Why Shoot a 300 Blackout? var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); 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. (That was a mistake Ill rectify next barrel probably.). The barrel's length also allows the bullet to stabilize before exiting the muzzle, leading to a flatter trajectory and better accuracy. I have a 762-SDN-6 suppressor on a 300 BLK rifle I built with a 16 barrel shooting subsonic 220gr ammo but I dont get the tick, tick, tick when shooting. Best twist rate for 300 Blackout? The fastertwist rate is perfect for the 220 grain ballistic monsters that subsonic 300 BLK ammunition use, but for the lighter hunting rounds (like Barnes 110gr round) not so much. The more we all know, the better organized and stronger the shooting and hunting community will be. It also has a great barrel life, which means it can go for long periods and operate effectively under varying conditions. And it also serves as a specialized 30-Cal rule-beater that lets 3-Gun competitors make major with a low-recoil cartridge that also offers long barrel life. FWIW. Sig ONLY uses that 6.75 (not 6) barrel length for their Military full auto Black Mamba entry gun MCX. 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. 300BLK vs. 7.62x39? Heavy, slow moving subsonic bullets experience more bullet drop than fast, more aerodynamic bullets. Affordable Factory 300 BLK Ammo is Available Everything from .22lr to subsonic .308 Winchester, and even 5.56 NATO from a 16 barrel. Regardless of the position it plays, the .300 BLKs performance often hinges on finding the best barrel length and load combination for the distance you have in mind. .300 BLK ammo fired from a short barrel can hit targets at 100 yards, which is more than enough range for home defense. Eventually, they got their own 300 Blackout cartridge SAAMI approved in 2011. 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). and ask bribes of companies to remove bad reviews. Consider a rifle with a barrel 1000 yds long. Did you get it repaired? You have entered an incorrect email address! 300 Blackout SAAMI Cartridge Specification. For example, with a 10.5-inch barrel, the .300 Blackout clocks an average velocity of 2200 feet per second. 300 BLK by AAC: An Introduction by Paul Erhardt. Most AR-15 upper 300 Blackout rifles feature the 1:7 and 1:8 twist rate, which is the rifle barrels spin rate. For the best experience on our site, be sure to turn on Javascript in your browser. Factory Starline and SIG produced 300 HAMR cases are available, but cases can be made from common and available 5.56/.223 cases. 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). I have two .300 BLK uppers from PSA. Shorter barrels do not result in less accuracy. 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. If you are shooting only subs, then even something as short as the Sig Rattlers 5.5 barrel (less than 3.25 of rifling!) Personally, if I had to do it all over again, I would definitely not go with a 762-SDN-6. I was at first considering a 9" barrel with a 1:7 rifling, for that is what the cartridge was designed around. But its the opposite with the 300 AAC? .300BLK may be great in a 9 barrel with some loads (powder, charge weight, primer, bullet, internal case capacity, etc. ), while others may be better in 8 or 10 barrels. By and large, the relatively rapid loss of velocity confines the 300 Blackout to near medium and close ranges. The 300 Blackout is frequently available with 200 and 220 grain bullets. That is your shortest, lightest choice that will give you a tiny snap snap like a loud claparound 119-121 db. Web5 models Noveske Lo-Pro Gas Block 300 AAC Blackout Barrel (1) As Low As (Save Up to 14%) $351.50 Final Sale. It is extremely easy to convert an AR-15 to fire 300 Blackout ammunition, and the rounds ballistic performance is different enough to justify purchasing the barrel necessary to do so. On the downside, the weight of these bullets prevents them from traveling far and maintaining a flat trajectory. As always, train with your rifle and make sure you know your intended purpose before you buy. However, the stainless steel core will eventually wear out from too much full-auto fun. If downrange energy is a critical consideration, the last yardage that still carries at least 400-foot-pounds is italicized. 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. Ive loaded 5.56 for over 30 years. 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. This is because most operators commend the high stopping power of the 300 Blackout in close-combat engagements compared to other ammunition issues. Would be really nice to be accurate (reliably hit 12x12 target at 200..maybe 250 yards?) However, even worse for accuracy is the projectile slowing from supersonic to subsonic velocity. The thing functions with everythingfrom 125 grain Sierra with 17 grains of Lil Gun to 220 grain Hornady with 10.5 of AA 1680. 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. The accuracy of a .300 Blackout barrel will depend on the exact round and barrel length you use. Subsonic 220Gr loading is 9.6Gr IMR 4227 and that is a near capacity load Id guess there is room for 11Gr. For the best experience on our site, be sure to turn on Javascript in your browser. PWS is as close as you can get right now. So, dont read to much into the issues. They lack the mass to carry a proportionate level of energy at downrange, though. 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. From there it really degrades. Despite its compact size, a .300 BLK round fired from a short barrel can still hit targets up to 100 yards away. The Sporting Arms and Ammunition Manufacturers Institute (SAAMI) approved and published industry standards and specifications for the .300 BLK on Jan. 17, 2011. Its also long enough to deliver sufficient bullet velocity to hit targets accurately at 100 yards. I make my living building high end audio equipment, I cant afford ear damage. Or is it a different type of powder altogether? Ive had no problems with PSAs Cust Service. I want to get a barrel and file a form1 but just havent yet. 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. Heavy, slow moving subsonic bullets experience more bullet drop than fast, more aerodynamic bullets. A longer barrel also offers a long line of sight for you to better aim your rifle even if the rifle is not equipped with sight extensions. 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. Passing through the sound barrier imparts wobble. There is no real difference in muzzle blast from either, both rifles use identical Surefire brakes. 80% Arms sells AR-15 and .308 80% Lower Receivers, 80% Lower Jigs and other accessories which allow you to legally build a firearm at home in most states. 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 theory, a longer barrel offers more room for bullet expulsion. A successful hunt requires sneaking up on a target until you're close enough to take a clean and fatal shot. 1) Barrel length? For example, with a 10.5-inch barrel, the .300 Blackout clocks an average velocity of 2200 feet per second. Really -- the largest difference is barrel length. I get a rifle firing sound which seems down range. Having a longer barrel also provides more time and surface for the bullet to stabilize from the point of firing to the point where it exits the muzzle. How many ATF officers does it take to count to two stamps? Heavy grain subsonic bullets are barely able to retain true subsonic performance. It didnt take long for engineers at two of the industrys finest to solve the problem, though. Cartridge Overall Length: 2.02 inches. From there it really degrades. 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.. 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. Conversely, its lightweight projectile bleeds energy downrange, the reason Hornady lists it as a target shooting and varmint hunting load. They announced their current suppressor line at the 2013 shot show and we are now just starting to see them trickle into the retail channel. Although the 300 Blackouts effective range depends on the shooter and application, the chart above provides rough guidelines for consideration. Scroll right to see energy, drop and coefficient data. The .300 Blackout is quite effective when hunting for animals like wild pigs, deer, or varmint. will be fine. The question that Ive always asked when I look at this is is why hasnt someone figured out one can just as easily make a modern set of 125gr and 220gr 7.6239s and blow away the .300 BLK at its own game? One for the M16 regardless of barrel length. So, if a 5.56 requires 20 inches of barrel to burn all of its powder, would it make sense to reduce the powder quantity when shooting a 5.56 through a 16 inch barrel (or even something much shorter like a 5.56 pistol)? Adjustible Gas Block??? My test gun is a Remington 700 with 16 5R barrel. The accuracy of a .300 Blackout barrel will depend on the exact round and barrel length you use. The stability provided by the long barrel will help the bullet fly on a flat trajectory and increase its likelihood of hitting its target. If you are shooting supersonic loads, a 16 barrel gives you more velocity. Realize that this gun is SPECIFICALLY designed for ultra close covert CQB use and is not concerned with supers and 100% powder burn. A 16-inch barrel ensures complete gunpowder burning to fire rounds with maximum force. As for silencers, either wait for the SIG SAUER cans to come on the market or get yourself an AAC MG-SD. Kirsten Provides Some Answers, Horner Wins Tactical-Optics Divison At Multigun Nationals, 300 AAC Blackout Load Data from Sierra Bullets, Scary Stuff .300 Blackout Fired in a .223 Rem Barrel, .300 Blackout Fired in .223 Rem AR Recipe for Disaster. 4 models Rainier Arms AR Ultramatch MOD2 300BLK Barrel $400.00 Final Sale. At 16-inches, muzzle velocities are near their peak. Best Barrel Length For Suppressed 300 Blackout For optimal performance with a suppressed 300 Blackout, we recommend a barrel length of 8-10. I have seen some measurements as high as 123db which is still VERY quiet. So many thanks for your article and any advice you can give. SAAMI, the industry standards organization, adopted and standardized the AAC 300 Blackout earlier this year. Shorter barrels are ideal if you want a concealable and easy-to-carry gun, while a longer barrel is the best choice for optimal accuracy. Nicole Krenze, *Competitive Shooter of the Week* 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. If you're looking for a multi-purpose load for the .300 AAC Blackout, this may be the best bullet. Chamber erosion, out of battery detonations in < 2k rounds, most of them. A longer barrel has a slower twist rate and provides more power and accuracy, which is better for long-range targets. Nobody shows pics like mine because it was not big dealnothing to talk about. The companies didnt start completely from scratch, though. The .300 Blackout also comes in a supersonic variant, which means once fired, the bullet travels faster than the sound barrier. What is Foghorns opinion of the Gemtech GMT-300BLK as a suppressor for a .300 BLK? Advanced Armament Corporation began developing a .30 caliber subsonic cartridge optimized for the M4 platform in 2009. Developed in 2009 by the Advanced Armament Corporation or AAC, the .300 Blackout is regarded as a round that gives top-class performance when compared to similar calibers. Piss poor cast trunnions where S7 forged are a necessity. 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. 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. 4 models Rainier Arms AR Ultramatch MOD2 300BLK Barrel $400.00 Final Sale. At 16 inches, muzzle velocities are near their maximum. 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. 125 and 225-gram .300 ammo fired from both barrel lengths can travel 100 yards without dropping. , in bullet weights that vary from 110- to 220-grains. 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). The well-known terminal performance of that Sub-X bullet, however, does make the load an ear-friendly option for some who hunt at relatively short distances. 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). They result in less range and more bullet drop at distance. 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. From there it really degrades. This is because the latter is thicker and wider, causing more drag as a projectile. Hornadys American-Made Ammo Cabinets Keep Your Gun Food Secure. Here are answers to common questions asked about .300 Blackout barrel length: The length of a .300 Blackout barrel affects accuracy in several ways. The kissing cousins resemble twins at a distance, but the similarities end at projectile girth. Best Barrel Length For Suppressed 300 Blackout For optimal performance with a suppressed 300 Blackout, we recommend a barrel length of 8-10. I dismiss this entire article as slow news day page filler. Suppressors minimize the chances of a sniper being located by sound, but they simply reduce audible emissions from their firearms muzzle end, not a projectiles characteristic crack. To avoid it from giving a shooters position, subsonic .300 BLK loads use heavier bullets and adjusted powder chargesoften tailored for a complete burn in a short barrel. If you build an AR pistol, the 300 is the perfect round. For those who need to run a .30-caliber cartridge from a standard AR15 platform (as opposed to the AR10), the 300 AAC Blackout makes sense. Notify me of follow-up comments by email. Most bullets from both cartridges weigh around 125-Grains. var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; 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. Mightnt 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? 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.

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