Compared to other rifle ammunition, 300 Blackout is a cross between popular military rounds like 5.56mm and 7.62mm. Additionally, there's also 300 Blackout subsonic for fans of suppressed fire. Great for target shooting, hunting, and tactical applications, 300 blk ammo is the high-performing low-recoil answer to bulky and cumbersome cartridges. Thanks to its incredible accuracy, the 300 Blackout round is tried and true to be one of the most versatile loads on the market. This centerfire ammo, also referred to as 300 AAC Blackout, is best known for its superb performance and versatility. I kinda wanna build one as a small persons/first timers rifle anyway, light shooting and suppressed makes for a good intro.Ballistic know-how combined with modern technology makes 300 Blackout ammo the go-to for seasoned shooters and marksmen. Still if I were building a subsonic AR today, it'd probably be a 9mm shooting 147gr HST out of a super short 5"-6" barrel with a 9mm suppressor. There's been a lot of back and forth on this over the years, and it's not like subsonic 300 is BAD, some people want lower sound over actual fight stopper, especially since most bad guys run away after getting shot at anyway. Also rounds need to be supersonic and then some to penetrate cheap 3A soft armor reliably, which has become more common in home invasions, which is when you're most likely to need a HD rifle. You don't get the hydrostatic shock, the round has to be going 1800-2000+ fps. Once 300AAC is going subsonic it's not really a rifle round anymore it's a handgun round, ballistically similar to subsonic 45ACP. I didn't read the subsonic part here b/c it's not what I was looking for, but I assume his point is that subsonic 300 isn't ideal for defense, it's ideal for being quiet. Despite the confusion I do appreciate the article because it was quick and helpful but still searching for the holy grail. You really don’t need high velocity, long distance accuracy when the largest open space in your house is 30-40 ft. Honestly most people will settle for 1 and 2. 300 BO seems to be 1) subsonic so quiet, 2) expanding (at subsonic speeds) so no over penetration yet is still a one shot threat reliever and maybe 3) costs less than $1 every time you need to take a shot. Are you assuming that even though supersonic, it wouldn’t reach those velocities in the close confines of a home defense situation or something? The holy grail round for self defense. Then you state the Fiocchi SST 125gr is a perfect round for defense after just explaining in section 2 that supersonic ammo is eneffective at staying suppressed because of breaking the sound barrier. You even include a picture of 2 suppressed rifles in the section. 300 BO is great for home defense (agreed). For home defense you start by saying a short, suppressed. These are on the lighter side of subsonic loads, so they move a little faster than the 220 grains, and this translates into a little extra energy. One solid subsonic load for the suppressor enthusiast is the Sellier and Bellot 200-grain FMJs. Nowhere near movie quiet, but quiet enough to be hearing safe. Suppressors only stop the blast at the muzzle end of the gun - they do nothing for the supersonic crack.30 Cal and 5.56 SuppressorsĪ subsonic load through a suppressor is nice and quiet. A subsonic round lacks that supersonic crack. When it comes to a suppressor, slower is better. The rounds can range greatly in weight from light 90-grain supersonic loads to 220-grain subsonic baseball bats. 300 BLK round is the fact it’s superbly versatile. When the time comes to put lead downrange, regardless of the reasons, you’ll be hearing bangs and not clicks. Magtech consistently makes quality ammunition - a solid choice for general fun gunning, tactical training, three gun, and more. When it comes to purely plinking, you can trust some lower-quality rounds, but in good conscience, I won’t suggest anything that might blow your gun up. This is very basic ammunition designed to function reliably and accurately for all your training needs, perfect to be bought in bulk. Supersonic ammunition flies forward at a blistering 2,230 feet per second, the ammo uses premium brass cases and high-quality FMJ projectiles.
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