As a lefty I quickly learned to pattern guns as most SxS guns shoot to the right for me. I had to determine how much to bend them to the left to get them on target. In the process I also discovered that many guns shoot low or high, and a few guns have divergent barrels. The worst I had was an AYA No 4 Deluxe. The left barrel shot eight inches to the left of the right barrel at 30 yards, and it got worse the further away the target was. That gun was not correctable and was sold to a man who put iron sights on the shortened barrel and made it into a pretty good slug gun. If you don't pattern the gun you won't know if the gun shoots where you look and that the barrels shoot together. The math is simple to do and a good stock bender can correct most off shooting pretty easily. I always pattern at 20 yards from my eye.
