Carlson makes a dead coyote choke tube designed for larger shot sizes and heavy shot. Ive patterned the 3.5 dead coyote loads along with some #4 buckshot and have good patterns out to 60 yards. I havent patterned anything farther than that. With that choke and winchester 3.5 inch #4 buckshot I consitently get 5+ hits inside a 10 inch circle at 60 yards.