Winchester Drylok Super Steel Magnum 10 Gauge shotshells are built for high-velocity knockdown performance in extreme hunting conditions. These 3.50 shells feature a 1 5/8 oz payload of BBB size plated steel shot with a muzzle velocity of 1350 ft/s. The two-piece double-seal wad and lacquered primer provide superior water resistance for reliable ignition in wet environments. Its heavy barrel-protecting shot cup ensures tight, consistent patterns for long-range waterfowling. Each box contains 25 rounds. Recommended use: waterfowl hunting. Safety Note This ammunition utilizes large BBB steel shot and must only be used in shotguns specifically proofed and rated for steel loads. Always verify that your chokes are compatible with large steel shot to prevent barrel damage or safety hazards.