Since suppressors are verboten in CA, I shoot 120g supersonic. Although functionally identical to the 300 Whisper, the 300 AAC Blackout is its own SAAMI standardized cartridge. Did you get it repaired? Our initial research data covered the relationship between barrel length and velocity for some 13 common handgun calibers/cartridges. A second stamp for the suppressor, a separate serialized firearm.. 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. This issue isnt unique to 300 Blackout bullets, though. Hunting, home defense, and competition style shooting, the .300 AAC Blackout does it all. The .300 Blackout is quite effective when hunting for animals like wild pigs, deer, or varmint. Selecting the best barrel length for the .300 BLK can be a double-edged sword. 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 have 2 Colt M-16s that Im going to convert to 300 Blackout. A fast burning powder might fully burn in those 9 inch of barrel, but even so, the pressure at the end will still be way higher than it is outside the barrel and hence the accelerating force on the bullet will still be more than friction. The main question you need to ask yourself is whether or not you plan on using a suppressor. 21.5Gr shows pressure signs. WebThe 300-Blackout is a lower-power 30-caliber cartridge. So would a better/different suppressor. One important consideration before you set out to build your AR-15 in the .300 Blackout is knowing the scope of usage of your gun. Best of both worlds. 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 barrel should also deliver enough bullet velocity to hit far-off prey with deadly impact. Supersonic bullets travel fast enough to generate sonic booms, and the resulting noise gives even suppressed gunshots a loud "crack.". will be fine. 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. I dont think you can get there in 9 inches with full-size powder loads regardless of how fast-burning they are. 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. 5.56 pistols from 8 & 9 barrels blow fireballs out of the barrel. A look at 300 Blackout ballistics including velocity, energy and drop data for some of the most popular loads among American shooters. Had a few questions for you if youd be so kind as to give me a bit of advice . Longer barrel lengths offer greater accuracy and velocity, with a maximum length of 16 for the 300 BLK. I was understanding that my 5.56 with 55 grain bullet needed a twist of 1:7 to be right. Burn rates mean more than amount of powder in your cartridge. Products manufactured by 80% Arms carry a lifetime warranty against manufacturing defects. The stability provided by the long barrel will help the bullet fly on a flat trajectory and increase its likelihood of hitting its target. 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 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. They term best is entirely subjective and influenced by intended purpose and individual needs. But what really makes me love it is the wide variety of calibers it can be used on. Its a few hundred FPS from my 16 AR9. They result in less range and more bullet drop at distance. Ive soured on fast attach systems not least because the ratchet on my 762-SDN-6 gave out after three years and direct thread is the way to go. The reduced recoil and muzzle rise make taking accurate follow-up shots much easier. That coupled with your complaints is why. There is, however, a point of diminishing returns. However, this maximum effective length is determined by the barrel's length, and the 460-meter distance is achieved by a nine-inch barrel. After investigation, AAC found the 7.6239 cases aggressive taper too extreme for a standard M4 magazine to accommodate. In my ignorance, I would say its because I want to reduce wear and tear on the suppressor. Let your fellow shooters know share this article using the Facebook, TKS! For .22LR, for instance, the optimum length is 16. Important correction Mr. Leghorn: the SilencerCo Harvester suppressor provides about 30 dB of suppression according to your graphic, not 40%. To counter this, of course, there is always the option of sticking a silencer onto the muzzle. Its not going to be long until you want to suppress it and/or SBR it. Perfect for integral suppressor or just using as an SBR/pistol. The SDN just doesnt silence 300 Black very well. Nowhere above did anyone mention the gas port or that once the bullet passes the gas port theres a significant reduction in pressure pushing the bullet and significantly more drag due to friction . With these details in mind, the best .300 Blackout barrel length for hunting is one that can hit long-range targets. 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. 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). This is because the latter is thicker and wider, causing more drag as a projectile. Personally, if I had to do it all over again, I would definitely not go with a 762-SDN-6. You have entered an incorrect email address! 8.2 is the shortest Rosco makes and its a really good barrel for me. Thus, proper 300 BLK and .300 Whisper, before it, run with tighter twist barrels. 2) would you build again with the same silencer? Just more satisfying to me than a real press. Based on feedback from shooting experts, the best barrel length for .300 Blackout suppressed is 8 to 10 inches. 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. 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. A successful hunt requires sneaking up on a target until you're close enough to take a clean and fatal shot. Sig ONLY uses that 6.75 (not 6) barrel length for their Military full auto Black Mamba entry gun MCX. Since the paperwork and tax didnt kill you, and they already have your fingerprints, youre gonna want to SBR it. Whether youre hunting, defending your home, or just shooting suppressed at the range, 300 Blackout is a popular and adaptable cartridge. This ensures that the bullet maintains a more accurate and precise trajectory upon exit and improves the target-inaccuracy issue. Pistol calibers often reach near optimum velocity at about 8-10; longer lengths may increase velocity, but only by slight amounts. 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. Don't believe in them, and never will. Question of the Day: How Do You Spread the Pro-Gun Gospel? 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. Scopes For Beginners: What is the Parallax Adjustment Knob and How Do I Use It? 1:8 or increasingly, 1:7, especially if you want to stabilize subsonic, LONG bullets at low temperatures. Factory Starline and SIG produced 300 HAMR cases are available, but cases can be made from common and available 5.56/.223 cases. For example, the Hornady Sub-X 190-grain load shot from a 10-inch barrel flies at 1,050 fps and drops 47.6 feet at 200 yards. 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* (function() { 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. ANd then you have barrel harmonics to contend with. The barrel's length also allows the bullet to stabilize before exiting the muzzle, leading to a flatter trajectory and better accuracy. The accuracy of a .300 Blackout barrel will depend on the exact round and barrel length you use. The .300 Blackout's rather streamlined shape allows for it to have magazines with minimal curvature, which makes them less prone to jam. dear sirs..just want you all to know how much, ..WAY DOWN DEEP IN THE PINEY WOODS WOOTEN. Web920K views 3 years ago What barrel length is best for 300BLK AR-15s? Subsonic and supersonic ammo both have features that pair well with a variety of barrel lengths. There is obvious powder burn outside the barrel which is clearly visible on video. The case heads are identical on 223 Rem and 300 BLK ammo, which makes the bolts on both interchangeable in many cases. Adjustible Gas Block??? For example, with a 10.5-inch barrel, the .300 Blackout clocks an average velocity of 2200 feet per second. Scroll right to see energy, drop and coefficient data. Just an old farts opinion! To add Im also a lefty so want to manage the gas as much as can be done. ALL RIGHTS RESERVED. If you are shooting only subs, then even something as short as the Sig Rattlers 5.5 barrel (less than 3.25 of rifling!) Be first to know about promotions and new product launches. A bullet also travels less horizontal distances from wind when it is faster. 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. This compatibility means that it can allow for major savings if you're a gun enthusiast who likes to stay on a budget. Supersonic ammo out of a 10-inch barrel retains rifle caliber velocities, but with more significant bullet drop at longer distances. Supersonic ammo retains rifle caliber velocities, has increased effective distance, and bullet drop is greatly reduced. Mike: yes. The military roots still show in the selection subsonic loads, although its neighborly friendly to ditch that familiar crack as the bullet breaks the sound barrierwhether its quieted at the muzzle by a suppressor, or not. By and large, the relatively rapid loss of velocity confines the 300 Blackout to near medium and close ranges. 4. I was at first considering a 9" barrel with a 1:7 rifling, for that is what the cartridge was designed around. However, if you want to hit targets at over 100 yards, the best barrel length for .300 Blackout subsonic is 16 inches. Easy Conversion: Use your current AR lower, bolt/carrier, buffer, and magazine. Our initial research data covered the relationship between barrel length and velocity for some 13 common handgun calibers/cartridges. However, even worse for accuracy is the projectile slowing from supersonic to subsonic velocity. It didnt take long for engineers at two of the industrys finest to solve the problem, though. The muzzle velocity used for 5.56 in the chart is with a 16 barrel, but the 300 BLK is using a 10 barrel. The ability to shoot full auto 300 BLK through an SBR with this can attached is impressive. Save my name, email, and website in this browser for the next time I comment. Visit us today to browse the .300 Blackout barrel lengths we have in stock and place an order to receive your selection at your doorstep. WebThe 300-Blackout is a lower-power 30-caliber cartridge. Saying things like at 10, the muzzle velocity hasnt yet reached its peak is misleading when youve got a cartridge with a wide swing of bullet weights and charge weights. QA/QD systems may add more tolerance stacking and complexity, but the silencer is snug and firm. We refer to it as one rotation over a particular inch of barrel. 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. laughably entertaining. 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. The shorter a gun barrel, the more the gas expulsion at the muzzle equals a relatively louder sound every time you shoot. However, if you want a .300 Blackout barrel that can deliver sufficient power, accuracy, and maneuverability to serve you in various scenarios, go for a 9 to 10-inch barrel. Factory Starline and SIG produced 300 HAMR cases are available, but cases can be made from common and available 5.56/.223 cases. Why would you detach your suppressor for supersonic ammo? Ive loaded 5.56 for over 30 years. Best twist rate for 300 Blackout? One of the best things about 300 BLK is that it gets complete burn in a much shorter barrel. 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. Perfect for integral suppressor or just using as an SBR/pistol. 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. 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. Converting an AR-15 to fire 300 Blackout is as simple as swapping its barrel. Compare that to the Omega at 120db and you have a HUGE audible difference. 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. Ive seen a few other suppressors suffer the same fate, for the same reason. 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. (That was a mistake Ill rectify next barrel probably.). Pick the barrel length (or performance target) you want and build a load around it then you can come up with some educated rules-of-thumb of your own. Able to suppress all rifle calibers up to and including 300 Winchester Magnum, its perfectly at home on the 300 BLK rifle offering about 40% sound reduction. Even the bolt stays the same, and all that changes is the barrel. CLICK HERE for more information. The length of a barrel also dictates the rifle's twist rate and thus the bullet as it travels down the barrel. 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? For those looking for a rifle can and not worrying about rimfire or pistol calibers, the SilencerCo Harvester is perfect. They think its Fudd ammo. If you want the longest range with a suppressed .300 Blackout barrel, get a 16-inch barrel and add a suppressor. 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. Dennis- 300 BLK starts with a 5.56 casing that they neck down much shorter, allowing for a wider and longer bullet that can now weigh significantly more than any 5.56 can. Currently they offer a 16 300 Blackout barrel for their MCX. 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 SAAMI diagram for the 300 BLK is shown below. We will promptly replace or repair any product that we determine to be defective. In the chart, bold-faced entries indicate the last distance at which each Hornady load drops less than 5 feet in different length barrelsfor those uncomfortable dialing in or holding over 60 inches. You can now purchase quality factory ammo and even premium Lapua 300 BLK brass. Affordable Factory 300 BLK Ammo is Available. 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). 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 development of the .300 Blackout was a joint effort between AAC and Remington Defense, and this was to produce a replacement for the 5.56 NATO. Hey, man. It will be NINE inches in length. Nicole Krenze, *Competitive Shooter of the Week* The 300 Blackouts recoil is not significantly different from the 5.5645, and its price isnt prohibitively higher. 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. Share the post "300 Blackout Basics Specs and Cartridge INFO", Tags: .223 Rem, .300 AAC Blackout, 300 BLK, AR15, Lapua Brass, Suppressor. For long-range targets, barrel lengths of up to 16 inches are available. Subsonic .300 Blackout rounds fix this problem by traveling slower than the speed of sound. 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. At 16 inches, muzzle velocities are near their maximum. With a warm barrel/suppressor unit, it is possible to shoot impressive groups. Another reason why 9 to 10 inches is the best overall .300 Blackout barrel length is the minimal muzzle rise and comfortable recoil. 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. 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. 300BLK vs. 5.56? This is because most operators commend the high stopping power of the 300 Blackout in close-combat engagements compared to other ammunition issues. 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? 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. That is your shortest, lightest choice that will give you a tiny snap snap like a loud claparound 119-121 db. Let's find out! 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. 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. Two Colt M16s? Bullets make a similar noise, although not nearly as earth rumbling, that is very recognizable and isnt always advantageous in combat. , in bullet weights that vary from 110- to 220-grains. This may possibly be true, but I dont see links to formally derived stats to back up this claim. Did you ever wonder why PSA always has 5 star reviews on their website That did more to spark interest in NFA items than anything. 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. For the best experience on our site, be sure to turn on Javascript in your browser. Heavy, slow moving subsonic bullets experience more bullet drop than fast, more aerodynamic bullets. Buy a .308 from a legit company and save yourself headaches. Results are in inches/foot-pounds of energy and based on a 100-yard zero with the scope 1.5 inches above the bore. Mike: I cant seem to edit my comment. While you can have a 9-inch .300 BLK barrel pistol, the best barrel length for .300 Blackout pistol is 6 inches. . CLICK HERE to see actual 300 BLK in .223 Rem chamber. There is no real difference in muzzle blast from either, both rifles use identical Surefire brakes. Some powders should not fill the case because of their density and overpressure problems with that much powder. Another shilling advertisement for Faxon Firearms products. Out of a cold unit, you will always have a flyer, usually the first shot. 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. If youve ever noticed, experienced shooters allow their rifles to cool between shots, to avoid changes in POI. Been there, done that. 300BLK vs. 7.62x39? FWIW. 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. Rumor has it that SIG SAUER is coming out with their new line of rifle silencers at SHOT Show next year,and they are currently appear to be quieter and more durable than anythingelse on the market. A very hot load in 300BLK I use is 120gr Nosler BTHP with 21.0Gr H110. One of the best things about 300 BLK is that it gets complete burn in a much shorter barrel. It also has a great barrel life, which means it can go for long periods and operate effectively under varying conditions. Consider a rifle with a barrel 1000 yds long. Sounds like somebody has way too much cash on his hands. Fortunately, you can reduce gunfire noise to protect your ears or hide your position by adding a suppressor to your barrel. Getting away with it because they had deeper pockets (costs a lot to get SAAMI cert) and Remington Defense backing.
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