Talked to William at sumtoy today. I asked for a recommendation on constriction of a choke for my benelli. I want to shoot 3-1/2" heavy 13 7's. He suggested a 650 and I ordered one. I then ordered 3 boxes of the heavy weight 7s. I have been shooting mag blends with a 640. My 40 yard patterns are not great. I typically take all my birds 35 yards or less. I got to thinking of that one time I may Mis judge and cripple a bird. Anyone with a similar set up please chime in to how you like the set up. Also what kind of patterns at 40 yards can I expect. Thanks.