Magtech .357 Magnum 158 Grain Full Metal Jacket Flat Brass Cased Pistol Ammo 50 Rounds. Magtech FMJ ammunition delivers reliable accurate performance on the range. Specifications for Magtech .357 Magnum 158 Grain Full Metal Jacket Flat Brass Cased Pistol Ammunition: Manufacturer: Magtech Caliber: .357 Magnum Number of Rounds: 50 Bullet Type: Full Metal Jacket (FMJ) Bullet Weight: 158 grain Cartridge Case Material: Brass Muzzle Velocity: 1235 ft/s Muzzle Energy: 535 ft-lbs Application: Target Self-Defense Package Type: Box Primer Style: Centerfire Lead Free: No Package Contents: Magtech .357 Magnum 158 Grain Full Metal Jacket Flat Brass Cased Pistol Ammunition What is Magtech .357 Magnum 158 Grain Full Metal Jacket Flat Brass Cased Pistol Ammunition good for? The manufacturer thinks that it is good for self-defense target.Magtech 357D: .357 Magnum 158 Grain Full Metal Jacket Flat Brass Cased Pistol Ammo 50 Rounds