Other then noise what is there any advantage to sub sonic rounds? Im thinking it may benifit M&P in close quarter sitiuations vs a full load?? Why would a guy want a 300 black out vs a .308??
Cheers!!
The primary advantage to subsonic is greatly reduced noise. There are lots of disadvantages to go along with it. Subsonics penetrate to a huge degree and would not be suitable for home defence as a result.
300 Whisper/Blackout is superior to a subsonic 308 because it will cycle an AR action where the bigger case won't. Subsonic 300 Whisper is at its best in short barreled carbines and PDWs because it does not lose velocity like conventional cartridges and it does not produce a massive blast and fireball.