I've used everything from 20 ga to 10 ga. 2-3/4" 3/4 oz loads to 3.5" 2-1/4 oz loads in single barrel break actions to sxs to ou to pump and semi auto. There's no perfect gun. Find one you like that fits you well in which you're comfortable shooting and practice with it until you can hit what you're looking at without question
This year I'll be using a 2.5" chambered 1890 Charles Daly hammer gun.
Pattern your gun and loads and hunt within your limits
Kicking it old school. Very nice and pretty tough to top!!! Please share a couple pictures if you are successful.