Winchester Super X 12 Gauge Ammo 2 3/4 1 oz. #7 Shot Value Pack ammo review offers the following information;Winchester has taken steel shot to a new level with these 12 gauge loads, which are designed to perform better in upland hunting–traditionally the exclusive domain of lead shot. With some jurisdictions mandating (for better or for worse) lead-free ammo, these improvements are coming at just the right time. These shells use thicker wads than Winchester’s lead loads to provide better protection for your barrel. The shot itself is made with a proprietary process that gives the shot better corrosion resistance and sphericity. Each shell in this box of 100 fires a one ounce load of #7 steel shot at a muzzle velocity of 1,325 feet per second.