Larry, I don't care about official status of early nitro proofs since we have to follow and try to keep low pressures in old guns. I did say Poudre Pyroxylee is Nitro Powder and with words Eprouve Fini means Nitro Proofed.
Let me remind you no one American nitro proof got no official status.
Nitro or not nitro proofed for pre-war guns such as Ideal is a just matter of price (maybe). Both nitro proofed and not nitro proofed guns could be used with modern nitro powders or nitro-for-black substitutes today.
Actually all this is useless argument.

Geno.