Bob; Something I do to analyze point of impact with shotguns is shoot at targets on water, like a pond. Try that and a bunch of different brands of shells before doing something drastic. If the gun really shoots a whole pattern low, I would have to do something too, but before making a drastic move you would want to make sure. It's easy to flinch on a pattern board, keep that in mind. In regards to a pattern board and analyzing POI, shoot 5 shot groups, then see where pattern is most dense. That's POI. It's easy to flinch on one of the 5 shots. And have someone else do the same with the gun.
Last edited by buzz; 03/19/16 09:32 AM. Reason: Clarification