Turkey shoots can be a blast with the right setup. The choke size will be a .680 which is what a 20 gauge shell is. So if a 20 gauge shell will fit you are fine. A lot of people use H&R single shots. I a H&R and an Remington 870. These guns really just all depend on what kind money you want to put into them. This is my 870 with a 36" barrel with full sleeve, .730 backbore with straight rifling, 4 wad stoppers, .675 choke, Williams rear and front front glow sight, a match chamber, trigger job down to two pounds and its weighted.
Target shot at 90' with Winchester 8's.