Multi- phase groove technology engages the shot cup and guides the pellets into a tight and consistent pattern, shot after shot. Rated for Hevi-Shot, Winchester, Long Beard XR, Federal Premium 3rd Degree, and other high-performance turkey loads. Heat treated steel for increased strength and Durability with powerful turkey loads. CNC –machined for optimum precision. Polished end face for better seating and sealing and also provides maximum power without pressure loss.