I don't understand the popularity of the 300ACC Blackout

[nisils14]

Hoser hit it on the head, what was once a wildcat cartridge is now a commercially available caliber to buy due to AAC's involvement and that definitely plays into 300BLK's popularity. While 300BLK isn't a ballistic monster compared to other AR15 cartridges, I think it makes for it in versatility. It uses standard AR parts, suppressor friendly, efficient in short barrels and 30cal bullets allow a wide range of bullet choices. It'll have similar ballistics with 7.62x39 on supersonic ammo. Go heavy and it'll have subsonic ammo that cycles, try that with 5.56 or any of those hot rod cartridges. IMO, it shines as a home defense round but I think you could poke at some whitetails with some 110-125 grainers within it's ranges. People use 300BLK on hogs all the time. There's a video of Travis Haley going 700m on a man sized target, so I'm assuming it's reasonably accurate for long range use. It wouldn't be my first choice but it's there. All in all one could say that it's a jack of all trades master of none kind of cartridge