I flyfish for pickeral quite a bit here in DE...they seem to be the first fish to turn on in late winter and can be a blast on a #4 or #5. I have had good success with using a double strand or #8 leader (attach 2 seperate sections of #8 leader material). I find it gives the fly better action. Also they have to bite through both peices of leader which I have never had them do. Sounds like a crazy idea but it works.