The first turkey I ever shot was back in 1970. I used an Ithaca model 37, 12 gauge, modified choke. Why? Because it was the only shotgun I owned. I remember distinctly, because it was my first turkey, I paced off the distance at 41 yards, I used a Winchester 2 3/4 Magnum load of 4's, and the bird had 4 pellets in the head, and 5 in the neck. Just pattern whatever gun you get, with the shot you plan on hunting with, so you know it's maximum hitting ability and range.
Sincerely,
Garry