.357 Magnum - Powder Coated 158gr SWC in the Henry Big Boy
This guide details the process of reloading .357 Magnum cartridges using 158-grain powder-coated semi-wadcutter (SWC) bullets and Unique powder in a Henry Big Boy rifle. The presenter, Johnny, walks through preparing brass, charging with powder, seating bullets to a specific depth, and crimping. He aims for an overall length of approximately 1.585 inches and uses 5.0 grains of Unique powder, a load he selected based on various sources, noting potential confusion with published data. The process emphasizes careful seating and crimping to ensure proper function in the rifle.











