What you need to do is go to oldgobbler.com. They have different forums of the performance of different turkey guns and choke and shell combo's. They have a spot for basically every common gun for turkey and what they have tried and produces the best pattern. Myself I shoot an 835 ulti-mag with a .680 kicks choke in it. Wicked combo. They can answer bout every question you have on a turkey gun. Great Site!!!