As well as in shorter barrel lengths (~eight″) the 300BLK is way outstanding for supersonics, no less than. Extended barrel 300BLK is close to pointless IMO, you will find other rounds that outperform it handily in the exact same System, with exact same length barrels. Measuring only at 1.seventy two″ https://adamg370vyt2.eqnextwiki.com/user