And in shorter barrel lengths (~eight″) the 300BLK is far excellent for supersonics, a minimum of. Prolonged barrel 300BLK is near pointless IMO, you'll find other rounds that outperform it handily in the exact same System, with same size barrels. You'll have to tweak subsonic handloads dependant on your rifle https://englandm876ajg7.thebindingwiki.com/user