well...shoot whatever makes you happy, but nothing compares to the heavier than lead shot (costs aside)...field testing or otherwise.... i don't shoot it at light geese during the conservation season then I stick to Fast Steel (or whatever is cheap)because I may shoot3 flats (750 shells) per weekend.... but otherwise I am shooting the hevi-stuff...it's like a roach motel, ducks come in and never get out....