This .458 diameter 400 grain Safari Solid hunting bullet is designed for lever guns such as the 45-70, 450 Marlin, and Marlin Guide Guns. Design incorporates 3 + 1 band configuration for reduced barrel strain. It has the 67% Meplat BBW#13 nose profile which has proven to give the deepest penetration of any bullet tested to date. Technical Info: Caliber: .458 Weight: 400 grains Required Twist Rate: STANDARD G1 Ballistic Coefficient: .180 G7 Ballistic Coefficient: OAL: 1.242 Projection Length: .460