Magtech 454 Casull 260 Grain Full Metal Jacket Flat Brass Cased Pistol Ammo 20 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 454 Casull 260 Grain Full Metal Jacket Flat Brass Cased Pistol Ammunition: Manufacturer: Magtech Caliber: .454 Casull Number of Rounds: 20 Bullet Type: Full Metal Jacket Flat Nose (FMJFN) Bullet Weight: 260 grain Cartridge Case Material: Brass Muzzle Velocity: 1798 ft/s Application: Target Package Type: Box Primer Style: Centerfire Package Contents: Magtech 454 Casull 260 Grain Full Metal Jacket Flat Brass Cased Pistol Ammunition Magtech 454B: 454 Casull 260 Grain Full Metal Jacket Flat Brass Cased Pistol Ammo 20 Rounds