I do realize that the 300 Blackout was designed to be subsonic from the start, even considering that the 45-70 wasn't designed to be subsonic I have read/heard of many subsonic 45-70 loadings. That gives it an average of $1.30 per round. Please note, the following information reflects the estimated average ballistics for each caliber and does not pertain to a particular manufacturer, bullet weight, or Just a quickie to see what hits on steel sound like and look like with 300 Blackout subsonic loads and supersonic loads. While ammunition is becoming more widely available, there is nowhere near the selection and availability as there is for .223 Rem or 5.56x45mm. 458 socom is dramatically superior at 100 … A friend of mine recently showed me his custom AR-15 in .300 blackout with a 9-inch barrel and AAC 762 suppressor. The AR-15s 5.56mm cartridges are obviously lighter than the AR-10’s 7.62, making it easier to carry more of them. Supersonic .300 Blackout does nothing that supersonic 5.56mm, 7.62x39mm, 6.8mm, or 5.45mm can’t do and subsonic .300 Blackout is a poor choice for defense. Although the 300 Blackout ammo is more powerful, more efficient, and more lethal when fired out of short-barreled rifles than 5.56 ammo, it falls behind the bullet energy of the 350 Legend being the heavier bullet. It’s where the cartridge’s roots are laid and there’s ample subsonic ammunition available. … I don't do either of those cartridges, so it's possible that I'm wrong about the heaviest 308s and their stabilization from a normal factory barrel. The tip helps when loading a cartridge like the 300BLK because it helps the cartridge navigate the feed ramps and chamber (see OAL notes at … Heavy versions operating at subsonic speeds do not create a pronounced sound crack or disturb the sound barrier. To avoid it from giving a shooter’s position, subsonic .300 BLK loads use heavier bullets and adjusted powder charges—often tailored for a complete burn in a short barrel. The larger bullets, meanwhile, carry more kinetic energy, making for greater stopping power with each round fired. Both are short barrel rifles and when loaded with subsonic ammo, the .300 blackout is very similar is … In comparison, the.308 ammo costs range from $.35 per round to $1.50 per round with an average of $.90 per round. The Bright Line Between 300 Blackout and 5.56 NATO: Similarities between the cartridges end with them sharing the same case and being tailored for military use. The .300 AAC Blackout (designated as the 300 BLK by the SAAMI and 300 AAC Blackout by the C.I.P. Top. The Hornady Sub-X 190-grain load, for example, exits the muzzle of a 16-inch barrel at 1,050 fps, where it is carrying 465 foot-pounds of energy. 5.56 vs 300 Blackout vs 308 Winchester: Ammunition Selection. I have dies, a box of coated 245gr cast bullets from Missouri Bullets, 165-173gr jacketed bullets I bought mainly for .308 and .30-06, 170gr JSP bullets I bought for .30-30, and 110gr plated bullets I bought for .30 Carbine. Where it differs, however, is in how many bullets you can carry at any given time. The 9mm is also a good candidate because it generally hovers just above the supersonic barrier in terms of velocity. Even with a suppressor, you probably won't get a heavyweight bullet to cycle "reliably" in subsonic with H110. Both the .300 BLK and the .308 Win use a .308 caliber bullet, though that’s really where the similarities end.Even if you quickly glance over the above table looking at the cartridge specs of these two cartridges, some pretty big differences should jump out at you. In a comparison of 300 Blackout vs. 9mm for use in a PDW / SMG, well, there really isn’t any comparison. Some of you stated that you would pick heavier and quieter rounds to preserve situational awareness and communication abilities. I just built a 10.5" .300 Blackout AR pistol. In 350 Legend vs 300 Blackout bullet energy, the 350 Legend gets another win. Otherwise, even though the initial wound cavity may look cool in ballistic gelatin, it is not enough to cause any real damage. It should go without saying, when talking 300 Blackout vs 5.56 in the AR platform, there’s little reason to settle for one or the other. Along with subsonic rounds, the Silencerco Saker 7.62mm is able to reduce the sound signature from your .300 Blackout rifle to a mere 132 decibels, which is hearing safe. Summary: Subsonic 300 Blackout is significantly more powerful than subsonic 5.56, 9mm, and even .308, which makes a 300 Blackout rifle one of the most powerful nearly “Hollywood quiet” rifles you can have. All you need is a new barrel. 300 HAM’R. 300 Blackout is a preferred caliber for suppression in rifles, for the same reasons discussed above. Links to published Data added. The higher BC of the 300 would only matter at longer ranges that are impractical (but not impossible) for subsonic velocities when hunting.The only real advantages the 300 has is slightly quieter suppressed operation due to smaller bore diameter and the fact that is a bottleneck cartridge which offers advantages in feeding reliability. View topic - Powders For the 300 blk. now that Tromix is offering .458 socom barrels/parts, sure have been leaning towards .458 socom. In fact, a .308 with 200-210gr bullets is hardly breaking a sweat at 2,400fps, which is faster than .300 Blackout can manage with compressed loads and lightweight bullets. The 300 Blackout Vs 5.56 conversation is like debating apples and oranges. AS YOU CAN SEE THE 300 HAM’R HAS A SOLID 300FPS VELOCITY AND A 400FP ENERGY ADVANTAGE OVER FACTORY 300 BLACKOUT AT THE MUZZLE. In keeping with this motif, an AR-15-style bolt carrier works best with subsonic. Parting Shot. 300 HAM’R vs 7.62×39 BALLISTIC COMPARISON. Is it possible that the venerable 308 can be quieter than 300blk?? 350 legend offers the same advantage- if you want to shoot farther you pop mags and you're good to go. Many of the newer Hornaday projectiles have polymer tips and come in heavier weights that can be loaded for subsonic use in the 300 Blackout. Though they are similar in overall size, the .300 Blackout has a slightly longer overall length (2.26″ vs 2.2″), but the 7.62x39mm has a slightly longer case length (1.528″ vs 1.368″). Like previously mentioned, H110 has been extensively tested to work great for supersonics, while A1680 is great for subsonics. Most subsonic Blackout ammo uses a bullet in the 200-grain range, and, of course, .308 diameter. The casing for the .308 Win is significantly larger than the 300 BLK and can hold a considerably higher amount of powder and withstand greater pressures. Meaning that subsonic 220 grain 300 blk will outperform 308 subsonic in 180 grain. Oh, and while you’re at it, make sure th… I also realize that subsonic cartridges weren't meant for … The standard .22-caliber Despite the fact that 300 BLK vs 9mm, not 300 BLK vs. 5.56 NATO, is the more appropriate comparison to make since taking down 9mm was the cartridge’s primary focus. The short action is intended for everything from 17 Remington up to 308 Winchester and this is the size needed for a bolt action rifle chambered in 300 Blackout. Thanks to its higher velocities, the 5.56 is much more adept at longer ranges. Big game hunters may prefer the larger round for its ability to take down more substantial targets. Tags: 300 BLACKOUT, 300blk, Subsonic, supersonic When we last left you , the discussion of choosing either subsonic or supersonic ammo for your 300BLK defensive weapon was in a full-on firefight. Oh, and as an extra requirement, how about achieving the first two with the AR-15platform we already have. 16.25” Barrel; Sierra 125gr SBT 2520FPS MV, 1763FP ME; Hornady 150gr SST 2290FPS MV, 1747FP ME; 7.62×39. The following ammunition cartridge ballistics information and chart can be used to approximately compare .30 M1 Carbine vs .300 AAC Blackout ammo rounds. First, you need at least 2,500 fps to guarantee that the initial wound cavity causes permanent damage to the organs near the entry wound. Compared to the AR10 .308 rifle, both firearms are impressively light, making them easy to use. Some experts say you need 3,000 fps because the bullet rapidly slows down after it leaves the muzzle and it needs to be at 2,5… One last note, suppress shooting is a no brainer … 300 Blackout. Our organs are amazingly elastic and resilient. The goals of the 300 BLK movement were simple: achieve similar ballistics to the 7.62x39mm (AK) platform, develop an offering that delivers more “stopping power” when launched from a short-barrel rifle or pistol, and improve performance over 9mm offerings in the subsonic velocity band. AR-15s are con… Most factory loads of 300 Blackout have 30 bullets, which can be very light or very heavy. “The 300 BLK used to be an odd duck, but not anymore.” “Brass could be made from 5.56 NATO cases by cutting them down and re-necking them.” “…easy-shooting .30 caliber round…” “The 300 Blackout is a fully mature, commonly available cartridge that allows the shooter to have a vast range of options as far as end use. Joker31D Silent But Deadly Posts: 304 That makes the 300 Blackout about 45% more per round on average. With the right bullet and specialized loading, it can successfully be made subsonic. Since the 5.56x45mm NATO, .300 Blackout, and .308 Winchester are so popular, most of the big ammunition manufacturers produce a variety of ammo for all three cartridges. For example, costs of 300 Blackout rounds range from $.60 per round to $2.00 per round. As a result, 300 Blackout works perfectly with standard AR-15 magazines, bolts, and everything. The subsonic 300 Blackout loads are often compared to 45 ACP, 10 mm or 9mm subsonic rounds. The .300 AAC Blackout is the cartridge built to function in the AR-15 platform, and with its design comes a different mindset, as the cartridge is called upon to fill a special role. I was intrigued to compare it with my HK UMP 8-inch barrel gun. One advantage of 300 blackout is the fact that one can carry multiple loads in different mags, if you need to engage a target past 100 you pop the subsonic mag and drop in some supersonic 125gn loads and now you're deadly out to 300 in seconds. 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