In the southern coastal plains of NC where the swamps are many and the thick woods are all, buckshot have been used for many years. With autoloaders and pumps some of the load combinations are 4 buckshot what ever size, I prefer 00's if the gun patterns those the best, but the last shell being a slug. Reason being, running those big bucks with dogs, you probably get a shot in about a 2' opening and the deer running sometimes wide open. If the buckshot don't get him and you get an opening at 75 yds. the slug is there for backup.