Gauge: 20 - Type: Rifled Lead - Length: 2.75 - Muzzle Velocity: 1600 fps - Ounces: 3/4 oz - Shot Size: Slug - Application: Hunting - Rounds Per Box: 15 - For superior slug performance you can't beat the stopping power of Winchester Super X slugs. Specifically designed to deliver maximum accuracy and tremendous energy deposit in shotguns with smooth bores. Can also be used in rifled choke tube barrels or fully rifled barrels.