As well as in shorter barrel lengths (~8″) the 300BLK is way excellent for supersonics, no less than. Prolonged barrel 300BLK is around pointless IMO, you can find other rounds that outperform it handily in the same platform, with exact same length barrels. This load was very accurate, besting probably https://300blackoutbrass52841.tinyblogging.com/the-definitive-guide-to-300-blackout-brass-82798087