PPU's Handgun ammunition is brass-cased, non-corrosive boxer primed and features improved bullet designs which result in greater energy performance, bullet expansion, and reliability. Series Defense Caliber 22 rem jet mag Application Home Defense Bullet Type Soft Point Bullet Weight 45 gr Muzzle Energy 519 ft lbs Boxes Per Case 10 Rounds Per Box 50 Casing Material Brass Muzzle Velocity 1950 fps Unit Of Measure box