My friend a 16 gauge Merkel (1620) that shot center of pattern 6" low at 25 yards, both barrels. Maybe ammo, but who knows. He had never fired it and took it dove hunting and was missing everything and went to another gun and started knocking them down. He found out what was going on shooting at a patterning board. Gun went back to Merkel to get both barrels regulated. Yep, they shot to point of impact. Just to the wrong point of impact.

foxes rule