I bought a bunch when they first came out. To say that the shell performed dismally would be a compliment. I contacted the factory and they promptly replaced all my ammo with regular hevi-shot. They tested the ammo I sent back and it was all within their specifications. Now I'm not saying it won't kill a duck, but when it takes at least 3 shots to bring to hand every bird hit, it just isn't worth it no matter what it costs. Buy some Kent Matrix and you'll think its 1975 all over again. JW