9” from the breech is where the proof house measures peak pressure in France.

.022 wall thickness gets my attention, not in a good way, in any older gun, especially if it was not proofed at that dimension. The .022 reading is out there, at 20” from the breech, the pressure is dropping at that point. I wouldn’t attempt to use the promotional loads on sale at Wally World, but, with decent low pressure stuff, it sounds like it would be fine.

Show us some pictures, Milt.

Best,
Ted