480 Ruger 370gr Hard Cast Buffalo Bore Heavy – 1200 fps – 20 RoundsBuffalo Bore Heavy . 480 Ruger ammunition delivers maximum penetration and raw stopping power in one of the most formidable big bore revolver cartridges ever made. Each round is loaded with a 370 grain Hard Cast Lead Flat Nose bullet, designed with high hardness (typically 1822 BHN) to drive straight and deep through heavy bone, thick hide, and dense muscle without deforming or fragmenting. This load achieves 1200 feet per second muzzle velocity (from