Freedom Munitions X-DEF Defense .357 Sig 124 Grain Hollow Point Brass Pistol Ammo 50 Rounds. Thoroughly tested in Freedom Munitions own underground ballistics lab the 124 grain projectile travels at a velocity of 1350 fps with a 4'' barrel and penetrates 13''-15'' into ballistics gel. Specifications for Freedom Munitions X-DEF Defense .357 Sig 124 Grain Hollow Point Brass Pistol Ammunition: Manufacturer: Freedom Munitions Caliber: .357 Magnum Number of Rounds: 50 Bullet Type: Hollow Point (HP) Bullet Weight: 124 grain Cartridge Case Material: Brass Application: General Package Contents: Freedom Munitions X-DEF Defense .357 Sig 124 Grain Hollow Point Brass Pistol Ammunition Freedom Munitions FMX357SXD124N50: X-DEF Defense .357 Sig 124 Grain Hollow Point Brass Pistol Ammo 50 Rounds