I use the Patternmaster in my M1 20 and geese out to 60 yards are not a problem. You will need to practice with it because your shot string will be only about 6 feet not the 12 to 15 your use to which results in clean misses or dead birds. Its well worth getting use to it will change how you feel about steel shot. I run an outfitting buisness and my hunters are amazed at the range of my 20Ga. Good Luck
Troy