First of all you don't need 3.5 inch shells. I used them for years, and they just don't pattern as well as 3 inch, and they cost more dough. This is not just my opinon. Do some research and you will find many hunters that are more qualified than me, that say the same. I have also been using Kent Fasteel for years, and if you are shooting decoyed birds it works great. One more thing, If you are doing your job as a waterfowler and getting the birds to land in your spread, an improved choke is all you need. If you are not shooting decoyed birds, give me a PM and I will try and teach you how to really hunt!