David,
From extensive testing I can tell you that 100-110 grain of Triple 7 loose ffg powder and using the 3 1/2 “ shot cups loaded with 2 ½ oz. of #4, 5, or 6 should produce a pattern @ 30 yards like no other. You should maintain roughly 380-425 #6 shot pellets in a 30” circle. Hope this helps, thanks.