Winchester Blind Side 2 Ammunition uses improved Hex Steel Shot for tighter patterns and harder hits. Built for the tough conditions of waterfowl hunting, the legendary Drylok Wad system helps powder stay dry to keep you in the hunt. Blind Side 2 is still staked, still fast, and now even more deadly. FEATURES: Shot and wad system maximizes pattern performance for increased kill zone through all factory and aftermarket chokes. Choke tubes must be rated for steel shot