Franco, current research indicates that patterns are so variable that shooting less than a group of 10 can easily lead you astray. One of the reasons there are so many points of view and differing beliefs about shotgun performance stems from shooting too few patterns to draw statistically valid conclusions. Also, "eyeball" of all those little pellet holes doesn't seem to work out. The mentioned book shows how to use digital photos to record patterns and feed the computerized Insight program for statistical output. Do it right and make your work count - my suggestion.
