And in shorter barrel lengths (~8″) the 300BLK is far outstanding for supersonics, no less than. Long barrel 300BLK is near pointless IMO, you will find other rounds that outperform it handily in a similar System, with exact size barrels. You will have to tweak subsonic handloads based on your https://lukasipubg.designertoblog.com/70210594/5-essential-elements-for-300-blackout-brass