Generally an extra-full or any specific turkey choke should be fine. If you're like me and don't have a bunch of money to blow testing all the 9 dillion possible combinations of loads/chokes, then your best bet would probably be to go the "extra full" route and buy a couple different shells to test.

I like to think about it like this... man has been hunting with some form of shotgun for hundreds of years and the interchangable screw-in choke tubes weren't introduced until 1959.

Surely people were out hunting turkey with these guns before the interchangable choke tubes came into play, same with all the fancy loads that are out there.

Use the shell that patterns best out to 40 yards, and start on the cheaper end of the spectrum before buying a bunch of high-end stuff for testing. If a $19.99 Carlson choke tube and a $20 box of shells patterns well out to the "magical 40 yard point," then I would say you're ahead of the game.