Sign up for our newsletter to receive updates and exclusive offers, Copyright 2023- Ballistic Advantage - All Rights Reserved. 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. 9 models V Seven 300 AAC Blackout Stainless Match Barrel (8) As Low As (Save Up to $10.00) $359.99 Best Rated. http://thetruthaboutguns.com/author/foghorn/, Illinois Freedom Week Starts Today: Federal Court Blocks Enforcement of Illinois Assault Weapons Ban. despite the short barrel. Have an 8.2, 10.5 and a 16.0 inch. 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. What is Foghorns opinion of the Gemtech GMT-300BLK as a suppressor for a .300 BLK? 9 models V Seven 300 AAC Blackout Stainless Match Barrel (8) As Low As (Save Up to $10.00) $359.99 Best Rated. Any insight on following: You can either start with a barrel length, or a baseline load. I would recommend the Silencerco Saker 7.62 instead. At 16-inches, muzzle velocities are near their peak. 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. 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. Having a longer or shorter barrel is a matter of understanding the dynamics of ammunition, barrel design, and overall shooting conditions before you settle on a preference. The speed of sound is 1,275 feet per second (fps) at sea level and varies slightly with temperature and atmospheric pressure. If you are shooting only subs, then even something as short as the Sig Rattlers 5.5 barrel (less than 3.25 of rifling!) Ask Foghorn: What Barrel Length for a 300 AAC Blackout Rifle? 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. OUR GST-9 IS UNAFFECTED BY THE LATEST 12/28 ATF CLARIFICATION LETTER & SHIPS IN 3 DAYS! The 16-inch barrel also delivers greater energy on impact regardless of the ammo type. 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. Hunting, home defense, and competition style shooting, the .300 AAC Blackout does it all. It could, if youre hand loading. 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). Most AR-15 upper 300 Blackout rifles feature the 1:7 and 1:8 twist rate, which is the rifle barrels spin rate. With the can on it, it also is ear safe and the 25yd accuracy is like the other one with the same type red dot. They lack the mass to carry a proportionate level of energy at downrange, 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. It didnt take long for engineers at two of the industrys finest to solve the problem, though. Three? CLICK HERE to see actual 300 BLK in .223 Rem chamber. Like you stated, as long as there is more pressure pushing the bullet forward than barrel friction retarding it, the bullet will continue to accelerate. 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* Reader Pete writes: Hi Nick,I live in Amarillo and really enjoyed your article on your 300 BLK build. SAAMI creates and publishes industry standards for safety, interchangeability, reliability and quality, as well as coordinates technical data for agencies, enthusiasts and manufacturers. Did you get it repaired? What failed exactly? Sound travels at 1,100 fps at sea level on a standard day. or youll solve them. 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. Since the paperwork and tax didnt kill you, and they already have your fingerprints, youre gonna want to SBR it. Here is the link. The barrel also plays a role in the drop rate of the bullet. 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. 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; 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. 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. At 300, holdover is only 23.4 inches. The AAC uses a similar weight and dimensional bullet as a 30BR and 20 inch barrels and longer are the standard for those highly accurate bolt guns. And the stellite core will be much more durable than the Harvester (and probably what Sig will come out with). I was amazed at myself. I was at first considering a 9" barrel with a 1:7 rifling, for that is what the cartridge was designed around. 9 AAC 1:7 melonite barrel is the best Ive tested. Will the gun be a 'do it all' for long-range or short-range shots? Daniel Squ, Brass-cased ammo generally outpaces steel in every, *Competitive Shooter of the Week* Be first to know about promotions and new product launches. Save my name, email, and website in this browser for the next time I comment. WARNING: With some bullet options (and setback during chambering) 300 Blackout rounds will go into a .223 chamber and fire. .the same content appeared at breachbangclear.com about a week ago, they dont attach a name to it either. 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. In theory, a longer barrel offers more room for bullet expulsion. The .300 Blackout's rather streamlined shape allows for it to have magazines with minimal curvature, which makes them less prone to jam. Nine inches of barrel will give you the perfect balance of light weight and velocity with the 300 BLK cartridge. Best of both worlds. Plus higher velocity typically requires less hold over. They can run any barrel length without an additional stamp. I know thats a long discussion, but Im primarily wanting close range tactics with a very short barrel (likely 9). Then you can also pick a slightly faster burning powder to get a complete burn in 16 of barrel. Even better, the .300 Blackout barrel comes in various lengths, allowing you to pick a length that best fits your needs. Cartridge Overall Length: 2.02 inches. Unscrewing a muzzle device and replacing it with a suppressor in the field sucks. For optimal performance with a suppressed 300 Blackout, we recommend a barrel length of 8-10. 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 30BR pushes from 107 grains to 120 grain 30 cal projectiles. But barrel length can significantly impact your firearms performance. If you're looking for a multi-purpose load for the .300 AAC Blackout, this may be the best bullet. As weve established, longer barrels deliver the most accuracy and velocity, and the longest .300 Blackout barrel you can get is 16 inches. Hornadys American-Made Ammo Cabinets Keep Your Gun Food Secure. Even so, 1:7 isnt terrible. Muzzle Velocity: 2,259 fps. This gives more energy on target, a flatter trajectory and less wind drift. Lets explore all this caliber has to offer including an in-depth look at 300 Blackout Ballistics. The .300 BLK bullets are 0.30 inch in diameter (7.62 mm) and the .223 Rem (5.56 mm) is 0.224 inch. 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. These loads are heavier than most rounds and feature an adjusted powder charge that delivers peak bullet velocity by combusting completely within short barrels. Have had a LOT of different ARs including a Colt upper in 7.6239 that I killed my first deer with! This issue isnt unique to 300 Blackout bullets, though. Instead, they built the round from the M4-compatible 5.56mm cartridge. Subsonic and supersonic ammo both have features that pair well with a variety of barrel lengths. I have a Sig red dot on my 556 upper and a 4-1240 Bushnell scope on my 300. If the .300 BLK is good enough for the U.K. and U.S. military, its more than enough for home defense. Don't believe in them, and never will. WebThe 300-Blackout is a lower-power 30-caliber cartridge. Lack of wind drift alone is a decided advantage, along with a flatter trajectory. 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. 300 BLK by AAC: An Introduction by Paul Erhardt. The extra speed can be so great as to cause bullet failure. The shortest .300 Blackout barrel we have in stock is the 6-inch barrel. Converting an AR-15 to fire 300 Blackout is as simple as swapping its barrel. Longer barrels also screw up the timing, 16 with carbine gas is on the outside fringe of reliable for the 300. I did 100 rounds a night for 6 nights. 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). Planes that increase their velocity until it reaches and exceeds that mark generates a sonic boom. 2) would you build again with the same silencer? 3. However, for the best results, we suggest that you use recommended hunting ammunition variants of the .300 Blackout, like the 125-135 grain range. The ideal barrel length when hunting with .300 BLK is one able to reach long-range targets with sufficient bullet velocity and energy on target for a lethal impact. Would be really nice to be accurate (reliably hit 12x12 target at 200..maybe 250 yards?) 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. SOCOM 7.62 Mini suppressor. 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. 125 and 225-gram .300 ammo fired from both barrel lengths can travel 100 yards without dropping. 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. This may possibly be true, but I dont see links to formally derived stats to back up this claim. Appreciate so much your sharing of experience so that I dont have to go through all the same trial and error. Pistol calibers often reach near optimum velocity at about 8-10; longer lengths may increase velocity, but only by slight amounts. Best Barrel Length For Suppressed 300 Blackout For optimal performance with a suppressed 300 Blackout, we recommend a barrel length of 8-10. 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. The shorter a gun barrel, the more the gas expulsion at the muzzle equals a relatively louder sound every time you shoot. The thing functions with everythingfrom 125 grain Sierra with 17 grains of Lil Gun to 220 grain Hornady with 10.5 of AA 1680. })(); To comment on a post, click Post Title or "Comment" Link. What happened was the Sig Brace. Using a short-barreled rifle is ideal for home defense as its compactness makes it easier to maneuver throughout the home. Wheres a good source for ballistic data muzzle velocities for various bullet weights , loads, fired from various length barrels. 9 models V Seven 300 AAC Blackout Stainless Match Barrel (8) As Low As (Save Up to $10.00) $359.99 Best Rated. The accuracy of a .300 Blackout barrel will depend on the exact round and barrel length you use. 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. Sig ONLY uses that 6.75 (not 6) barrel length for their Military full auto Black Mamba entry gun MCX. Let's find out! At 16 inches, .300 Blackout barrel muzzle velocity is close to its peak, giving you a powerful weapon for making accurate long-range shots. Compared to other ammunition like the 350 Legend, the .300 AAC Blackout is more effective in taking long-range shots. I dismiss this entire article as slow news day page filler. var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; For a more economical build experience, getting a full lower build kit will save you some bucks. The more we all know, the better organized and stronger the shooting and hunting community will be. My friend bought a 300 Blackout upper from PSA and put a can on it. Any discussion on the effective range is a minefield full of opinion best tiptoed over by indicating those figures make the .300 BLK at 300-yard shot territory most comfortable for veteran shooters. Better question still. Maybe not so much that the longer barrel is directly responsible for greater accuracy, but indirectly? 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? However, a 20+ inches barrel may be too unwieldy and impractical for anything but target shooting. Really -- the largest difference is barrel length. Wilson Combat 11.3 barrel (worried this is too long) You have entered an incorrect email address! Scopes For Beginners: What is the Parallax Adjustment Knob and How Do I Use It? Also, you shouldn't trust in Trustpilot. 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? 5.56 pistols from 8 & 9 barrels blow fireballs out of the barrel. 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. 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. SAAMI, the industry standards organization, adopted and standardized the AAC 300 Blackout earlier this year. 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. 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. So would a better/different suppressor. Part of todays confusion over 300 Blackout effective range and barrel length often stems from this flavor. The other had an issue with the gas block; I contacted PSA and they immediately fixed it at no charge and with no questions, and it also has run perfectly since then. Web920K views 3 years ago What barrel length is best for 300BLK AR-15s? At 16 inches, muzzle velocities are near their maximum. The best option is one that youre not going to like: wait. 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. COPYRIGHT 2021, THETRUTHABOUTGUNS.COM. Drop is predictable; wobble is not. For 5.56 NATO, that point is 20 of barrel. JMO on this, 300BLK is VERY MUCH a reloaders round. .300BLK may be great in a 9 barrel with some loads (powder, charge weight, primer, bullet, internal case capacity, etc. 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. Its a few hundred FPS from my 16 AR9. 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. _gaq.push(['_trackPageview']); The .300 Whisper developed by J.D. 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. You may not reproduce original text or photos without advanced permission in writing. 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. The 220 grain subsonic .300 Blackout goes at about 1010 feet per second with 500 foot-pounds of muzzle energy. I have 2 Colt M-16s that Im going to convert to 300 Blackout. Other 300 BLK Resources John McClain, *Competitive Shooter of the Week* I tried 220g subsonic, but the boing of the buffer spring was annoying enough to prompt me to upgrade to stainless and stick with the supersonics. Even the .357 magnum picks up considerable velocity when shot from a 16 or 18 carbine. Supersonic bullets travel fast enough to generate sonic booms, and the resulting noise gives even suppressed gunshots a loud "crack.". It depends on the intended purpose of the rifle. The 300 BLK shoots .308 caliber bullets. Really -- the largest difference is barrel length. So many thanks for your article and any advice you can give. Mission accomplished. 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). 300BLK vs. 7.62x39? All you need is a bigger diameter barrel. This .30-caliber bullet at 500 yards drops by less than 9 feet (21 less than the subsonic version) and it carries 362-foot-pounds of energy there. Survival AR-7 Rifle, http://blog.silencershop.com/300-blk-impressions/. 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. Comparing my 5.56 barrels (18.5, 14.5 and 10.3) is a whole different story. They had a 1.5 star rating 3 years ago. 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. We refer to it as one rotation over a particular inch of barrel. .300 BLK ammo fired from a short barrel can hit targets at 100 yards, which is more than enough range for home defense. 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. 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. Suppressor length is a grey area as it doesnt count as barrel length or open-air (something in-between, depending on internal geometry), but through testing you can predict how a specific suppressor affects your velocity. 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). It also singes the hair on my knuckles. It has a very short barrel and runs a long 9 can. 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. The accuracy of a .300 Blackout barrel will depend on the exact round and barrel length you use. A big boom, and a really big flash, sounds like fun, when fun is the goal, anyway. The chief difficulty in accurately firing 300 Blackout comes from learning to accommodate its pronounced bullet drop. For Pete this isnt ideal, but for the average person this would be a good option. 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?
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