And in shorter barrel lengths (~eight″) the 300BLK is way outstanding for supersonics, at the very least. Extensive barrel 300BLK is close to pointless IMO, you can find other rounds that outperform it handily in a similar platform, with same duration barrels. Much like the 125-grain Nosler AccuBond, this bullet https://dallasqxqfa.amoblog.com/5-essential-elements-for-300-blackout-brass-60880216