Hunting Elite Ammo Features 165 Grain Sig Sauer .300 Winchester Magnum Copper Solid ammo! Hunting Elite Ammo Specifications Brand: Sig Sauer Category: Centerfire Rifle Rounds Caliber: 300 Winchester Magnum Model: Hunting Series: Elite Bullet Weight: 165 GR Rounds Per Box: 20 Casing Material: Brass Bullet Type: Copper Solid Muzzle Energy: 3543 ft lbs Muzzle Velocity: 3110 fps