High Performance Features High Performance Rifle series consists of a multitude of calibers and popular bullet styles to match your specialized hunting and shooting pursuits. All assembled with premium components and the ultra-tight tolerances that put more home reloading presses on the back shelf than any other brand. Remington High Performance Rifle. High Performance Specifications Caliber: 220 Swift Model: High Performance Bullet Weight: 50 gr Rounds Per Box: 20 Casing Material: Brass Application: Hunting Bullet Type: Pointed Soft Point (PSP) Muzzle Energy: 1586 ft lbs Muzzle Velocity: 3780 fps