If I'm not mistaken, aren't guns over seas proofed with only one round through them? If so, and the bores are at minimal wall thickness, why would that make you feel better in shooting it. You can do the same thing yourself, either re-load to the highest pressure listed and secure gun and remotely fire it. I still don't think that one round is enough to jusify being "safe".

I don't know about other gun manufactures, but L.C. Smith in the 1920's proofed their guns with double the load and so stamped NP on the barrels water table.

Also if I missed it, has anyone ever posted what a 10,000 psi load breaks down from breech to muzzle? I just picked this at random because to me it is extermely high for vintage guns.

David