Very interesting. I'll rush home and check the proof marks on my Army & Navy which was opened to 2 3/4 before being sent to the London Proof House. Should say 1 1/4 oz. I gave my Bozard to Toby Barclay at the Southern SXS to take back to England for work including 2 3/4" chambers and reproof. As I recall, it was stamped 1 1/8 oz. So it should come back stamped 1 1/4 oz (assuming it survives).
They are both damascus.
The reason I asked this question is the first place was because I have been trying to determine just how much pressure, in PSI, the old girls will take. Tons and bars are too mysterious to me. To be safe, I load WinAALite and 7/8 oz of shot at 1050 FPS and 5500 PSI. But I really should understand proof marks if I'm going to keep buying these ancient fowling pieces.
