As well as in shorter barrel lengths (~eight″) the 300BLK is much superior for supersonics, at the very least. Prolonged barrel 300BLK is close to pointless IMO, you will find other rounds that outperform it handily in exactly the same platform, with very same length barrels. Measuring only at one.seventy https://300-blackout-brass16047.blogsidea.com/45612281/brass-300-blackout-secrets