Found this note in the Loyalist Arms site that I had missed before.
"Loading and proofing data available for all our muskets".
My most recent purchase from them came with information so that I could do my own
test if I wished. A lot of places misuse the term "proofing", whether they are American builders or importers of guns or parts from India.
No American builder, or anybody else in America or Canada, can
proof a gun barrel. You can test the heck out of them..., you can fire double balls and huge loads, xray and magnaflux the barrels before and after..., but
you cannot proof a barrel unless it undergoes testing at an approved "proofing house". In fact using that term means it underwent testing in such an approved facility, and to use it otherwise is wrong. No proof houses exist in North America.
Further, although the Proofing Houses all accept identical criteria for modern propellant firearms..., they each have their own standards for black powder proofing, and they very quite a bit.
So if you hear of a builder, or an importer, and "He proofs all his rifles"..., no he doesn't :nono: , though he may test them well, unless he sends the barrel to one of the proofing houses in another country. Interesting to note, one of our German friends on this forum has guns with barrels from India, and in Germany (and also in England I think) for people to own those guns with the touch hole drilled, they MUST be sent to the proofing house and passed. So far all of his India made barrels have passed.
LD