I run a Sumtoy .562 in the lower barrel (tss #8s LH hand loads) and Turlock IM .590 in the top barrel ( #7s nickel-plated lead hand rolls) or you can use a Golden Pheasant load, it works well from "shoestring" to 25 yards...Others told me that you want your further distance barrel, lower barrel 40-45 yards, to be lined up with your shoulder, more steady, makes sense...Check your POA (barrels) at 25 yards with cheap dove loads... Good luck!