If you are going to be shooting a Federal shell with the fcw I suggest using a choke that is non ported and has no type of wad catchers/strippers. However I have seen a few people get good results with the Federal heavyweights using the ported Pure Gold chokes. I prefer the PG Tempest or to have something custon spun up for the fcw loads. There is a new one by Indian Creek out called the Haymaker that is made for the fcw loads as well but I have not tested one yet. Personally I stay away from the Federal lead loads with the fcw, they are garbage. Give thier new turkey thug loads a try, you may be surprised!