Loading 300 Blackout - ep 4 - Supersonic load workup for 168gr A-Max
This guide details a load workup for 300 Blackout supersonic ammunition using 168gr Hornady A-Max bullets with IMR 4227 and Winchester 296 (H110) powders. It covers brass preparation, priming, powder charging, bullet seating with attention to overall length, and crimping. The process emphasizes careful observation of pressure signs and group sizes during live-fire testing at 100 yards using a Lead Sled for stability. The instructor, with apparent reloading experience, highlights discrepancies in published load data and the importance of individual firearm testing.













