And in shorter barrel lengths (~8″) the 300BLK is much excellent for supersonics, at the least. Prolonged barrel 300BLK is close to pointless IMO, you'll find other rounds that outperform it handily in the same System, with exact size barrels. Just caution when looking with .three hundred Blackout subsonic rounds. https://chickv790izp9.bloggactif.com/profile