I always pattern my guns using 3 shots on the same sheet of paper. I mount the gun and shoot like I would at the live bird. This gives me a good idea where I am shooting as an average. Hopefully all three are in roughly the same area. If not, I re-shoot a group of three. Since I am shooting easel paper with 1" squares from the office supply store I can easily see how I need to adjust the stock dimensions to make a specific gun shoot where I am looking. I always shoot at 16 yards to make the calculations easier. Once I get the gun adjusted I may move further back to make any POI that is off center more prominent.
