I've shot those with good results from a Moss500. Federal says to use a Full choke and not an x-full turkey choke as this can interfere with the wad. Also bear in mind the flight control has less pellets due to the wad thickness. I get really good results with the undertaker choke and Winchester supreme's loaded with a full load of #6's,about 12-15 in the head and neck w/60 or so in on a 8x11 paper at 40yds. Good luck!