Freedom Munitions X-DEF Defense .357 Magnum 158 Grain Hollow Point Brass Pistol Ammo 50 Rounds. Thoroughly tested in Freedom Munitions own underground ballistics lab this 357 Mag travels at a velocity of 1400 fps with an 8'' barrel and penetrates 13''-15'' in clear ballistic gelatin. Specifications for Freedom Munitions X-DEF Defense .357 Magnum 158 Grain Hollow Point Brass Pistol Ammunition: Manufacturer: Freedom Munitions Caliber: .357 Magnum Number of Rounds: 50 Bullet Type: Hollow Point (HP) Bullet Weight: 158 grain Cartridge Case Material: Brass Application: General Package Contents: Freedom Munitions X-DEF Defense .357 Magnum 158 Grain Hollow Point Brass Pistol Ammunition Freedom Munitions FMX357XD158N50: X-DEF Defense .357 Magnum 158 Grain Hollow Point Brass Pistol Ammo 50 Rounds