As well as in shorter barrel lengths (~8″) the 300BLK is way exceptional for supersonics, at least. Long barrel 300BLK is in the vicinity of pointless IMO, you could find other rounds that outperform it handily in the same platform, with similar duration barrels. This load was extremely exact, besting https://franciscoifyoa.worldblogged.com/43993149/details-fiction-and-300-blackout-cases