Thanks for the input. I was expecting to see information about how the two barrels centered their patterns relative to each other at various ranges. I keep missing with my tight barrel and I'm wondering if the barrels do not shoot close enough together. I shoot left handed. I shoot the left barrel first and it shoots where I look. The right barrel's pattern is centered 8 inches to the right of the left barrel's pattern center at 20 yards. I haven't tested other distances in detail yet but the left barrel appears to be spot on at 40 also. I used full chokes for both barrels.