try Federals new load Black Cloud, I patterned some the other day. At 40 yards there wasnt a hole even a green wing teal could get through. I am so confindent in it I am buying a case of it, plus it is cheaper than Hevi-Steel. I use a briley goose choke, I have also heard a pattern master is a good choke. If you buy a pattern master choke dont use black cloud, black cloud use a flight control wad that it uses the pm neglects any advantage that the wad might have.