I've spent some time over on the NWTF boards, particularily the Shotgun and Shotgunning board. I consider that board to be the best source of objective information concerning shotguns, chokes,and loads for turkey hunting. Steve Canovan posts there under the name Night Hawk. Super nice guy anda multiple time NWTF national still target shooting champion. He is one ofthe many guysover there who are very serious about loads, chokes, patterning, andpractical translation toturkey hunting.
I provide a like below toa recent patterning testusing wet phone books.Hevishot 7s out penetrates lead 6sdespite a 200 fps advange for the lead 6 load
http://www.nwtf.org/message_board/ubbthreads.php?ubb=showflat&Number=128698#Post 128698
Interesting test shooting a store-bought turkey with lead 5s vs HS 5s.
http://www.nwtf.org/message_board/ubbthreads.php?ubb=showflat&Number=128722#Post 128722