I had an early 12 ga. NID which was off the face enuf to give a light transmitting breech. Shells rattled when closed. Kicked hard with 1 oz target loads--to the shoulder not the face. Another fellow who shot it commented the same without prompting. Didn't notice protruding primers in the empties; maybe I didn't look. I should have put those little foil washers on the breech wall and run a (subjective) comparison but I didn't so I can't claim that the "cure" proves the existence of the "disease". Maybe there will be an occasion in my first 74 (Coming soon!) to find out for myself in conditions of reasonable scientific rigor.

jack