Here in N.Y. I use #04 buck w/ full choke but There is a Heavy shot out there size #T shot its even called Coyote Killer [ or something like that] , how ever I can't afford the heavy shot loads. Earlier mention of BBB is probably fine . I've heard of people using 3'' mag #2 lead shot and doing well out to 45-50 yds. If you aren't after the pelts slug'em , I shot them with slugs during our deer seasons and it really puts a hole in them, they don't go far Good Luck Wiz