In 350 Legend vs 300 Blackout bullet energy, the 350 Legend gets another win. 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. Parting Shot. 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. Top. Joker31D Silent But Deadly Posts: 304 As a result, 300 Blackout works perfectly with standard AR-15 magazines, bolts, and everything. 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. now that Tromix is offering .458 socom barrels/parts, sure have been leaning towards .458 socom. 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. 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. Some of you stated that you would pick heavier and quieter rounds to preserve situational awareness and communication abilities. “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. 350 legend offers the same advantage- if you want to shoot farther you pop mags and you're good to go. 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″). For example, costs of 300 Blackout rounds range from $.60 per round to $2.00 per round. Oh, and while you’re at it, make sure th… 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. 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. 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. 5.56 vs 300 Blackout vs 308 Winchester: Ammunition Selection. 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 AR-15s 5.56mm cartridges are obviously lighter than the AR-10’s 7.62, making it easier to carry more of them. 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. In comparison, the.308 ammo costs range from $.35 per round to $1.50 per round with an average of $.90 per round. 300 HAM’R vs 7.62×39 BALLISTIC COMPARISON. 300 HAM’R. That makes the 300 Blackout about 45% more per round on average. Like previously mentioned, H110 has been extensively tested to work great for supersonics, while A1680 is great for subsonics. Is it possible that the venerable 308 can be quieter than 300blk?? The larger bullets, meanwhile, carry more kinetic energy, making for greater stopping power with each round fired. Links to published Data added. 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. 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. 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. 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. Hence, this would be a great addition for you if you have an arsenal full of other weapons besides the .300 Blackout Rifles. 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. 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