And in shorter barrel lengths (~8″) the 300BLK is way excellent for supersonics, not less than. Very long barrel 300BLK is near pointless IMO, you'll find other rounds that outperform it handily in the identical platform, with exact size barrels. Stick with published information only, the sole exception is it https://emilioscmwe.blogrenanda.com/45778814/how-much-you-need-to-expect-you-ll-pay-for-a-good-300-blackout-reloading