BattleHawk Armory - Winchester SUPER PHEASANT 12 Gauge 1 3/8 oz 2.75in Centerfire Shotgun Ammo 25 Rounds X12PHV6. These shells come in 12-gauge and go off with a muzzle velocity of 1450 ft/s. They are loaded with 1 3/8 ounces of size #5 or 6 shot to ensure home runs with.