Specifications for Winchester Long Beard XR 12 Gauge 2 oz 3 1/2 in Centerfire Shotgun Ammunition: Gauge: 12 Number of Rounds: 500 Shotgun Shell Length: 3 1/2 in Muzzle Velocity: 1200 ft/s Shotgun Shot Weight: 2 oz Primer Location: Centerfire Cartridge Case Material: Brass