As well as in shorter barrel lengths (~eight″) the 300BLK is much excellent for supersonics, at the least. Very long barrel 300BLK is around pointless IMO, you will find other rounds that outperform it handily in exactly the same platform, with identical duration barrels. The aac-sd with 110gr Sierra varmint https://vannevarh048frd6.thebindingwiki.com/user