300 blackout barrel length chart

To counter this, of course, there is always the option of sticking a silencer onto the muzzle. Longer barrel lengths offer greater accuracy and velocity, with a maximum length of 16 for the 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. Basically, machine guns get exempt from the stamp for a shorter barrel. This is actually much tighter twist required to stabilize the short 124gn. 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. 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). I was at first considering a 9" barrel with a 1:7 rifling, for that is what the cartridge was designed around. Bullet drop is calculable, though, so that should really fall under marksmanship, as opposed to intrinsic accuracy of the rifle? That is your shortest, lightest choice that will give you a tiny snap snap like a loud claparound 119-121 db. The 16-inch barrel also provides greater energy on impact, regardless of ammo type. The SAAMI diagram for the 300 BLK is shown below. I was at first considering a 9" barrel with a 1:7 rifling, for that is what the cartridge was designed around. With the War on Terror on the rise at the time, the development was also motivated by the need to produce a .30 caliber cartridge that would produce better results in combat than the 5.56mm rounds that were currently in use. 3. Been there, done that. Whether you decide to go long or short on your barrel is entirely a matter of what you are shooting at and where the shooting is taking place. I get a rifle firing sound which seems down range. FBI: Crime Rate Dropped During 2013, Year of Record Gun Sales. Comparing my 5.56 barrels (18.5, 14.5 and 10.3) is a whole different story. And thanks to the mounting system, you can get multiple end caps to thread it on everything from 1/2 x 28 threaded barrels to H&K 3-lug mounts with a few seconds of twisting. I feel strangely compelled to visit faxon.com and view their lineup of 300 blackout barrel lengths. Nicole Krenze, *Competitive Shooter of the Week* I do anticipate hunting deer / pig with this build supersonic of course. 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). I have two .300 BLK uppers from PSA. 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. I have a Sig red dot on my 556 upper and a 4-1240 Bushnell scope on my 300. Dont forget that longer barrel = greater sight distance for iron sights. If you're looking for a multi-purpose load for the .300 AAC Blackout, this may be the best bullet. 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. 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. Cartridge Overall Length: 2.02 inches. 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. Factory Starline and SIG produced 300 HAMR cases are available, but cases can be made from common and available 5.56/.223 cases. Short-barreled rifles come highly recommended for home defense because the compactness makes the weapon easy to wield within the walled and close quarters of a home. I was under the impression that accuracy needed to match bullet weight, (already mentioned), barrel length (also mentioned), and type of powder used. Copyright Ammotogo.com 2023 All Rights Reserved. By and large, the relatively rapid loss of velocity confines the 300 Blackout to near medium and close ranges. As a testament to the efficiency of the .300 AAC Blackout, several military units across the world, including the Netherlands, United Kingdom, and the United States, have adopted it. _gaq.push(['_setDomainName', '.accurateshooter.com']); For 300 AAC Blackout, that point is 9 inches of barrel. For .22LR, for instance, the optimum length is 16. I was understanding that my 5.56 with 55 grain bullet needed a twist of 1:7 to be right. 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. Factory Starline and SIG produced 300 HAMR cases are available, but cases can be made from common and available 5.56/.223 cases. 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? I did 100 rounds a night for 6 nights. So Remington will be budget-priced UMC-brand 300 BLK ammo through at just $12.99 per box thats less than most other rifle cartridges than are more powerful than the .223. Currently they offer a 16 300 Blackout barrel for their MCX. 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. The length of a barrel also dictates the rifle's twist rate and thus the bullet as it travels down the barrel. 300 Blackout is taking the shooting world by storm, and for good reason. 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. 300BLK vs. 7.62x39? COPYRIGHT 2021, THETRUTHABOUTGUNS.COM. These rounds can work well in taking out deer at distances of up to 300 meters, depending on who is handling the rifle and the shooting conditions they're in. Because the Blackout is wider, yet they tend to have similar weight, the Blackout has a lower Ballistic Coefficient than the 6.5 Grendel. Although the 300 Blackouts effective range depends on the shooter and application, the chart above provides rough guidelines for consideration. (AAC) or have you seen / heard of any better? 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. Thats the one, and only reason Im so anal about checking mine on the range, or in the field. A longer barrel, because of its increased surface area, provides more room for cooling in instances where you shoot continuously. However, this maximum effective length is determined by the barrel's length, and the 460-meter distance is achieved by a nine-inch barrel. Your second paragraph is spot on! 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. Shorter barrels do not result in less accuracy. Ive only ever seen youtube videos of it. Had a few questions for you if youd be so kind as to give me a bit of advice . 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. However, even worse for accuracy is the projectile slowing from supersonic to subsonic velocity. With a relatively convenient recoil, the .300 AAC Blackout is known for giving users an easier time staying on target. From there it really degrades. At 10, the muzzle velocity hasnt yet reached its peak. Why Shoot a 300 Blackout? Not sure, and maybe Im just splitting hairs. 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. A fast attach lets me do that. While on a 16-inch barrel, it reaches speeds of approximately 2400fps. .300BLK may be great in a 9 barrel with some loads (powder, charge weight, primer, bullet, internal case capacity, etc. 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. Some powders should not fill the case because of their density and overpressure problems with that much powder. 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. Heavy subsonic ammo in a 10-inch barrel may have lower velocities, but allows for the use of a suppressor without damaging your hearing. I doubt you would get extra wear and tear from using supersonic ammo in it. Web5 models Noveske Lo-Pro Gas Block 300 AAC Blackout Barrel (1) As Low As (Save Up to 14%) $351.50 Final Sale. 4 models Rainier Arms AR Ultramatch MOD2 300BLK Barrel $400.00 Final Sale. 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. For optimal home defense with the 300 Blackout round, a barrel length of at least 6 to 8 is recommended. It will be NINE inches in length. 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. Other 300 BLK Resources Help me if Im missing something here. Speared on by no issues I built a 10.5 inch pistol with an arm brace LOL. At 16-inches, muzzle velocities are near their peak. Most AR-15 upper 300 Blackout rifles feature the 1:7 and 1:8 twist rate, which is the rifle barrels spin rate. Compared with the muzzle energy of the .556, the .300 Blackout has the same muzzle energy that the .556 has at 500 meters while it is at 700 meters. Despite its compact size, a .300 BLK round fired from a short barrel can still hit targets up to 100 yards away. Sig ONLY uses that 6.75 (not 6) barrel length for their Military full auto Black Mamba entry gun MCX. The long Sig Titanium 7,62 is REALLY quiet. The 300 AAC Blackout definitely works for hunters who want to use their AR15-platform rifle. Stay in touch with Widener's, be the first to know about new articles, products, and more. 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. AAC didnt develop a damned thing. 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; This is why target shooters prefer short fat barrels they distort less under heat and cool faster. That typically occurs in much longer barrels that are commonly in use. Heavy, slow moving subsonic bullets experience more bullet drop than fast, more aerodynamic bullets. A bullet also travels less horizontal distances from wind when it is faster. ANd then you have barrel harmonics to contend with. A buddy has a 100yd range in his back yard. They lack the mass to carry a proportionate level of energy at downrange, though. _gaq.push(['_setAccount', 'UA-6323545-2']); 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. As explained by Robert Silvers, AACs R&D Director: [You can] shoot 30 caliber from your AR while still using normal magazines with full capacity. 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. Web5 models Noveske Lo-Pro Gas Block 300 AAC Blackout Barrel (1) As Low As (Save Up to 14%) $351.50 Final Sale. Lack of wind drift alone is a decided advantage, along with a flatter trajectory. For you math types out there, a 30 dB reduction is enormous actually better than some earmuffs if the number is correct. This guide takes a closer look at the various barrel lengths for the 300 Blackout round and where to find them. The distinction means the round can fit into an AR magazine, an AR upper built for the .300 Blackout, and an AR lower. Another shilling advertisement for Faxon Firearms products. Keep reading to discover the best barrel length for .300 Blackout for different shooting scenarios. 7.62 has a wider casing and requires different size magazines along with a different bolt. I hope it will post. 9 models V Seven 300 AAC Blackout Stainless Match Barrel (8) As Low As (Save Up to $10.00) $359.99 Best Rated. .the same content appeared at breachbangclear.com about a week ago, they dont attach a name to it either. _gaq.push(['_trackPageview']); Would be really nice to be accurate (reliably hit 12x12 target at 200..maybe 250 yards?) 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. At this point, frictional (and other opposing) forces will start to DECREASE velocity. Adjustible Gas Block??? Everything from .22lr to subsonic .308 Winchester, and even 5.56 NATO from a 16 barrel. 300 Blackout WAS stolen from 300 Whisper. What failed exactly? Cartridge Overall Length: 2.02 inches. As for silencers, either wait for the SIG SAUER cans to come on the market or get yourself an AAC MG-SD. Thats 8 inches of barrel for the 300 BLK 1-8. 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. A look at 300 Blackout ballistics including velocity, energy and drop data for some of the most popular loads among American shooters. While I can see Nicks point in preferring screw on suppressors over fast attach systems, there are reasons why the fast attach is superior in some cases. Best Barrel Length For Suppressed 300 Blackout For optimal performance with a suppressed 300 Blackout, we recommend a barrel length of 8-10. For 300 AAC Blackout, that point is 9 inches of barrel. Yeah, I lose some velocity for supers in an 8. The SDN just doesnt silence 300 Black very well. For instance, the nine-inch barrel has a 100-inch drop at 410 meters, while a 16-inch barrel has a drop of a 100 inches at 440 meters. 300 BLK is the perfect round to suppress. 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. 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). Compared to other ammunition like the 350 Legend, the .300 AAC Blackout is more effective in taking long-range shots. WebThey found the optimal barrel length for 300 BLK is between 9" and 11.5". You can now purchase quality factory ammo and even premium Lapua 300 BLK brass. And anything over 75 grain was better with a 1:9 twist. They can run any barrel length without an additional stamp. I wonder, though, whether people ascribe greater accuracy to a longer barrel, thinking longer barrel = straighter trajectory, when really its that longer barrel = greater velocity, which in turn implies less susceptibility to random wind movements? Dennis, running 7.6239 in an AR has a whole bunch of issues on its own. 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. We utilize state of the art 5-axis CNC machines to mill all our .308 and AR-15 80 percent lower receivers to incredibly precise tolerances using premium billet aluminum. Why would you detach your suppressor for supersonic ammo? The more we all know, the better organized and stronger the shooting and hunting community will be. I would recommend the Silencerco Saker 7.62 instead. Best twist rate for 300 Blackout? For example, with a 10.5-inch barrel, the .300 Blackout clocks an average velocity of 2200 feet per second.

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