Federal #6 in 3 or 3 1/2 inch depending on the gun I'm using. The most important thing is to pattern your gun to see if the load is going to work in your gun. Each gun is different. Some shoot Federal better, some Remmington or Winchester. Shot size can also effect the pattern. Had a gun once that shot a much better pattern with #4 shot than it did with #6. Go practice and see how the load patterns out of your gun.