And in shorter barrel lengths (~eight″) the 300BLK is much superior for supersonics, a minimum of. Extended barrel 300BLK is close to pointless IMO, you could find other rounds that outperform it handily in exactly the same platform, with exact same duration barrels. The aac-sd with 110gr Sierra varmint bullets https://edgarqwwuo.blogdiloz.com/37529800/not-known-details-about-300-blackout-bullets-for-reloading