As well as in shorter barrel lengths (~eight″) the 300BLK is far exceptional for supersonics, at least. Extensive barrel 300BLK is around pointless IMO, you'll find other rounds that outperform it handily in the same System, with similar duration barrels. Rising up with a secluded farm in rural southeast Kansas, https://eduardoodpfp.blogdosaga.com/38777623/getting-my-300-blackout-brass-to-work