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. Available in a wide variety of calibers and bullet weights along with supersonic and subsonic options where applicable. Specifications for Magtech 357 Magnum 158 Grain Full Metal Jacket Flat Brass Cased Pistol Ammunition: Manufacturer: Magtech Caliber: .357 Magnum Bullet Type: Full Metal Jacket (FMJ) Bullet Weight: 158 grain Cartridge Case Material: Brass Application: Target Self-Defense Primer Style: Centerfire Lead Free: No Package Contents: Magtech 357 Magnum 158 Grain Full Metal Jacket Flat Brass Cased Pistol Ammunition Magtech 357D: 357 Magnum 158 Grain Full Metal Jacket Flat Brass Cased Pistol Ammo 50 Rounds