The bottom bbl is stiking the target 4 inch low and top is grouping basically on target. So i konw they are not crossing. The groups are just so tight in the whole range of powders even though they separate from 4-6 inches, I tend to want to leave it as it is repeatable. At close range the 56 gr of powder load gives about 1 inch groups from both bbls at 25 yd -- so that will be my deciding factor.