I have been a huge fan of Nitro's as well as the Rhino .660 choke myself over the last 10 years. The problem I have is with their crimps and/or sealing issues. Seems that the buffer leaks out inside your vest pockets? For the money they charge for their shells, I wasn't happy with the leakage issues. So I switched to Winchester Longbeards as well, along with the Patternmaster code black choke.