I am using a 12 gauge Remington 870 Express with a 3 inch chamber on it. I live in Minnesota and its my first year turkey hunting. What is a good choke for turkey I have a modified and an improved i tested my pattern and the improved definately wont work but I havent tried the modified yet. Also I have to double check but I dont believe that I have to use steel on turkeys which do you preffer lead or steel and what shot size? Any help would be great. Also what is a desirable hit rate on targets and how far back should I go to?

Thanks,
It flies it dies