300 blackout barrel length chart

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. 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. The shortest .300 Blackout barrel we have in stock is the 6-inch barrel. For example, with a 10.5-inch barrel, the .300 Blackout clocks an average velocity of 2200 feet per second. The old 55 grain ammo used the 1:9 twist , the new 63 grain uses the 1:7 twist heavier bullets need more spin to stabilize and the tighter twist actually increase velocity by increasing dwell time. 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. Factory Starline and SIG produced 300 HAMR cases are available, but cases can be made from common and available 5.56/.223 cases. A 9 to 10-inch .300 Blackout barrel keeps a gun portable and short enough to wield easily. and ask bribes of companies to remove bad reviews. If you are shooting supersonic loads, a 16 barrel gives you more velocity. Most bullets from both cartridges weigh around 125-Grains. Since the 300 BLK stuffs a larger bullet into a cut down .223 case (which doesnt hold all that much powder to begin with), you have less powder to play with and thus dont need as much barrel. So many thanks for your article and any advice you can give. 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. Mike: yes. Remington Defense was part of the effort, which was no easy task because it included a requirement that it run in standard AR-15 magazines. We are not only talking about powder burn, but the pressure created by the expanding gasses of the powder. Sorry to be bearer of bad news. I am always available for you. 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? How many ATF officers does it take to count to two stamps? The LAST thing you want is a wobbly bullet going through your expensive muffler, not quite behaving itself. 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. My test gun is a Remington 700 with 16 5R barrel. 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. The .300 Whisper developed by J.D. Tyler Krenzel, While the AR-10 has been around for decades, there, *Competitive Shooter of the Week* Supersonic bullets travel fast enough to generate sonic booms, and the resulting noise gives even suppressed gunshots a loud "crack.". Whats the magic number for .300 BLK barrel length? This ensures that the bullet maintains a more accurate and precise trajectory upon exit and improves the target-inaccuracy issue. The 220 grain subsonic .300 Blackout goes at about 1010 feet per second with 500 foot-pounds of muzzle energy. There were also efforts to introduce the AK-friendly 7.6239 mm (also .30-caliber) to modern sporting rifles, but many of them ran into the cartridges case geometry challenge, where feeding can become a concern. A longer barrel has a slower twist rate and provides more power and accuracy, which is better for long-range targets. This is because the latter is thicker and wider, causing more drag as a projectile. So, dont read to much into the issues. 300 Blackouts effective range can stretch quite a bit depending upon your goals. 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)? Subsonic and supersonic ammo both have features that pair well with a variety of barrel lengths. My purpose is close quarter confined space self defense, not hanging out a helicopter shooting wild boar, although that sounds like a helluva lot of fun. Lantac or Gemtech BCG (want to ensure proper cycle) 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. If it's inside your house in home-defense scenarios, a short barrel will allow for better maneuverability. John McClain, *Competitive Shooter of the Week* Heavy, slow moving subsonic bullets experience more bullet drop than fast, more aerodynamic bullets. 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. The 300 Blackouts recoil is not significantly different from the 5.5645, and its price isnt prohibitively higher. Because the Blackout is wider, yet they tend to have similar weight, the Blackout has a lower Ballistic Coefficient than the 6.5 Grendel. One of the best things about 300 BLK is that it gets complete burn in a much shorter barrel. 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. I dismiss this entire article as slow news day page filler. Its an efficient round, but probably gets max velocity from 18-24 or maybe even 26 of barrel length. Any length over that will actually result in lower velocities. The stability provided by the long barrel will help the bullet fly on a flat trajectory and increase its likelihood of hitting its target. So heavy a bullet conveys a subsonic muzzle velocity and correspondingly softer report. The thing functions with everythingfrom 125 grain Sierra with 17 grains of Lil Gun to 220 grain Hornady with 10.5 of AA 1680. These days, #1 on my list, especially for new silencer owners, is the Liberty Mystic-X. So anyway, as I said, I did not bother to do anything but read about reloading dataknew nothing about over or under gassing or any of the other weird things. Even though it is short, a 6-inch barrel can generate enough velocity to hit close-range targets. Passing through the sound barrier imparts wobble. Perfect for integral suppressor or just using as an SBR/pistol. Damn was my arm sore on the 7th day, so I rested . It will also be fitted with an Omega can. He never got it to run right and put too much money into it. The article is a little wordy but does a decent job of explaining that the best barrel length depends on what optimal performance means to you. And cheaper to boot. By and large, the relatively rapid loss of velocity confines the 300 Blackout to near medium and close ranges. All the pics are Faxon barrels. Let's find out! Not even from a 300 BLK. 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. For instance, longer barrels generate more bullet velocity. Using a short-barreled rifle is ideal for home defense as its compactness makes it easier to maneuver throughout the home. 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. Nobody shows pics like mine because it was not big dealnothing to talk about. FBI: Crime Rate Dropped During 2013, Year of Record Gun Sales. But for a lot of shooters, its the ideal do-all round in an AR platform rifle. Web5 models Noveske Lo-Pro Gas Block 300 AAC Blackout Barrel (1) As Low As (Save Up to 14%) $351.50 Final Sale. Then you can also pick a slightly faster burning powder to get a complete burn in 16 of barrel. For 300 AAC Blackout, that point is 9 inches of barrel. Also, the 300 BLK shoots faster from a 16 barrel than a 9 barrel, particularly with supersonic loads. The SAAMI diagram for the 300 BLK is shown below. 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). Heavy, expensive, and absolutely fantastic. ), while others may be better in 8 or 10 barrels. I dont shoot subsonic. It didnt take long for engineers at two of the industrys finest to solve the problem, though. They think its Fudd ammo. SAAMI creates and publishes industry standards for safety, interchangeability, reliability and quality, as well as coordinates technical data for agencies, enthusiasts and manufacturers. You can now purchase quality factory ammo and even premium Lapua 300 BLK brass. Not on my 300 blk. Conversely, its lightweight projectile bleeds energy downrange, the reason Hornady lists it as a target shooting and varmint hunting load. With these details in mind, the best .300 Blackout barrel length for hunting is one that can hit long-range targets. Dont forget that longer barrel = greater sight distance for iron sights. That is your shortest, lightest choice that will give you a tiny snap snap like a loud claparound 119-121 db. The main question you need to ask yourself is whether or not you plan on using a suppressor. Question of the Day: How Do You Spread the Pro-Gun Gospel? For long-range targets, barrel lengths of up to 16 inches are available. This compatibility means that it can allow for major savings if you're a gun enthusiast who likes to stay on a budget. But what really makes me love it is the wide variety of calibers it can be used on. A 16-inch barrel ensures complete gunpowder burning to fire rounds with maximum force. 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. (AAC) or have you seen / heard of any better? The length of a barrel also dictates the rifle's twist rate and thus the bullet as it travels down the barrel. Just more satisfying to me than a real press. If you look up brown recluse or rattlesnake bites on the internet youll be scared shitless from the images. Its a few hundred FPS from my 16 AR9. Just an old farts opinion! This means the .300 Blackout is more effective at long distances. Did you ever wonder why PSA always has 5 star reviews on their website Chamber erosion, out of battery detonations in < 2k rounds, most of them. There is obvious powder burn outside the barrel which is clearly visible on video. It seemed to work OK for all those years. If your barrel is 8 to 10 inches, attaching a 6-inch suppressor will take the barrels length to 14 to 16-inches. For 300 AAC Blackout, that point is 9 inches of barrel. I dont know how the 30BR compares powder quantity wise to the 300 BLK, but that could account for the difference in barrel length. 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. Most AR-15 upper 300 Blackout rifles feature the 1:7 and 1:8 twist rate, which is the rifle barrels spin rate. For example, with a 10.5-inch barrel, the .300 Blackout clocks an average velocity of 2200 feet per second. In a tactical situation, I can see the reason for keeping it attached, but at the range, supersonic ammo is not going to be ear safe with or without a suppressor. If you want the longest range with a suppressed .300 Blackout barrel, get a 16-inch barrel and add a suppressor. 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. The long Sig Titanium 7,62 is REALLY quiet. (In the early days of jet aircraft, a lot of planes were shaken apart when passing through the sound barrier.) 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.. The. [Email your firearms-related questions to Ask Foghorn via[emailprotected]. Maybe not so much that the longer barrel is directly responsible for greater accuracy, but indirectly? 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. Hey Nick. dear sirs..just want you all to know how much, ..WAY DOWN DEEP IN THE PINEY WOODS WOOTEN. At 10, the muzzle velocity hasnt yet reached its peak. They are as dishonest as BBB/Angies List/etc. At this point, frictional (and other opposing) forces will start to DECREASE velocity. Twitter and other social media icons below. Let's find out! 1:8 or increasingly, 1:7, especially if you want to stabilize subsonic, LONG bullets at low temperatures. 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. 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. Lots of reasons for one to get get launched down range, but most have one thing in common, HUMAN ERROR. A longer barrel, because of its increased surface area, provides more room for cooling in instances where you shoot continuously. Plus higher velocity typically requires less hold over. Best twist rate for 300 Blackout? From there it really degrades. 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. For 5.56 NATO, that point is 20 of barrel. but horrible reviews on Trustpilot? Could you comment further on the ratchet latch on your SDN-6 failing? Nicole Krenze, *Competitive Shooter of the Week* or youll solve them. Those rounds like a slower twist, something closer to 1:10, but no one seems interested in making a barrel for that. The distinction means the round can fit into an AR magazine, an AR upper built for the .300 Blackout, and an AR lower. If you start with wanting a suppressed gun, you will eventually get to the 300. Subsonic .300 Blackout rounds fix this problem by traveling slower than the speed of sound. But there you have it. Be first to know about promotions and new product launches. This issue isnt unique to 300 Blackout bullets, though. A need for a nimble, stealthy firearm capable of stopping an adversary at moderate to short distances is one of the reasons for developing the .300 BLK. Besides being powerful and efficient, .300 Blackout rounds are ideal for home defense because they are lethal when fired from short-barreled guns. 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. Save my name, email, and website in this browser for the next time I comment. I think you still have cut the barrel down if you want a shorter barrel. If I had an adjustable gas block maybe but in reality I probably need Rifle+2 gas. Sounds like somebody has way too much cash on his hands. 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. Thats 8 inches of barrel for the 300 BLK 1-8. The 300 AAC Blackout definitely works for hunters who want to use their AR15-platform rifle. My friend bought a 300 Blackout upper from PSA and put a can on it. The only real question is what twist rate to go with. You can blow up your gun and sustain serious injury. 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. They straight stole J.D. Basically, machine guns get exempt from the stamp for a shorter barrel. If thats a factor, then it would maybe only come into play at great distances? 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. 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. My handloads have taken a pig and a Racoon. A very hot load in 300BLK I use is 120gr Nosler BTHP with 21.0Gr H110. 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! In the case of .308, if youre doing a bolt gun the longer barrel lengths can make a huge difference if you have the right powders same as my 9mm example. Piss poor cast trunnions where S7 forged are a necessity. 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). Jones design of .300 Whisper, gave it an ever so minor redesign, renamed it, and submitted it to SAAMI for certification. A 16-inch barrel will provide more velocity to compensate for the weight of the bullet, allowing it to travel further on a flat trajectory. While on a 16-inch barrel, it reaches speeds of approximately 2400fps. WebThe 300-Blackout is a lower-power 30-caliber cartridge. On the downside, the weight of these bullets prevents them from traveling far and maintaining a flat trajectory. 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). At this point, you should use internal ballistic calculation tools to match your selected variable to the other. 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. 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. Granted, revolvers have a barrel / cylinder gap, but that is a separate issue. The end caps on this rifle can be changed as well to mount it on different rifles with different thread pitches, but the stainless steel baffles arent great for full auto fire (they will probably melt). 9 models V Seven 300 AAC Blackout Stainless Match Barrel (8) As Low As (Save Up to $10.00) $359.99 Best Rated. 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. Lastly, barrel length affects a bullets twist rate how much a bullet spins within the barrel when fired. Did you get it repaired? As for silencers, theres some competition out there. QA/QD systems may add more tolerance stacking and complexity, but the silencer is snug and firm. Selecting the best barrel length for the .300 BLK can be a double-edged sword. Longer barrels are not automatically more accurate. Only specific barrel and ammo testing will tell, though. The only part you need to change is the barrel. . 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. A 1:8 twist works best with the light-weight supersonic rounds. 300BLK vs. 7.62x39? Better question still. The 300 Blackout would never see mainstream military use, although it became popular in the civilian shooter market. However, the stainless steel core will eventually wear out from too much full-auto fun. 300 AAC Blackout Ammo Review Armed forces in the U.K., U.S., and other countries use .300 Blackout because its stopping power and suitability for close combat are undeniable. 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. They lack the mass to carry a proportionate level of energy at downrange, though. Lets explore all this caliber has to offer including an in-depth look at 300 Blackout Ballistics. For optimal home defense with the 300 Blackout round, a barrel length of at least 6 to 8 is recommended. Converting an AR-15 to fire 300 Blackout is as simple as swapping its barrel. 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. I want to get a barrel and file a form1 but just havent yet. With a 1-7 twist rate, for instance, it means that the bullet will be spun once over 7 inches of rifling. In barrels16 or longer it is going to have a good 100-200 fps over the BLK using 110-115 grain projectiles. The 300 Blackouts sleeker bullet has a higher. Accuracy differences would be more apparent in supersonic loads where the transition from supersonic to sonic happens before the target. Any time you put a can on a rifle, an adjustable gas block will allow you to tune it. While you can, that is. But all things considered, the .300 Blackout will surely deliver whenever it's put to the task. 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. 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. The only thing that barrel length gets you is velocity the longer the bullet is in the barrel and being pushed by the expanding gasses of burning gunpowder, the faster that projectile will be going. Important correction Mr. Leghorn: the SilencerCo Harvester suppressor provides about 30 dB of suppression according to your graphic, not 40%. A big factor of consideration when picking a rifle, its barrel length, or ammunition is the type of target you wish to use it on. 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. Most AR-15 upper 300 Blackout rifles feature the 1:7 and 1:8 twist rate, which is the rifle barrels spin rate. When picking an upper for the setup, you can go either with a T-Marked or a Non-T-Marked, depending on your personal preference. The latter has nearly twice the propellant, and is therefore better able to fell very distant game. What is Foghorns opinion of the Gemtech GMT-300BLK as a suppressor for a .300 BLK? 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. Great Barrel Life: With a .30-caliber bore and a modest powder charge, barrel life is outstanding. Yeah, I lose some velocity for supers in an 8. Either way you go it is cheaper and requires the least modifications-while providing far superior performance and effectiveness over 5.56 in certain scenarios. SOCOM 7.62 Mini suppressor. 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. The more we all know, the better organized and stronger the shooting and hunting community will be. 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. A higher velocity will help a bullet fly with more power and speed, increasing how far a bullet can travel before gravity pulls it off its trajectory. WebThey found the optimal barrel length for 300 BLK is between 9" and 11.5". Perfect for integral suppressor or just using as an SBR/pistol. 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.

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