As well as in shorter barrel lengths (~8″) the 300BLK is way remarkable for supersonics, not less than. Very long barrel 300BLK is in close proximity to pointless IMO, yow will discover other rounds that outperform it handily in exactly the same platform, with same duration barrels. Measuring only at https://reloading-300-blackout-aa29528.liberty-blog.com/39179248/300-blackout-bullets-for-reloading-secrets