But September 13th, 1899 was the 1st date that Nitro proof was available so why wait till 1909 & w/ a purported black powder cartridge of 45-70, why would a Nitro proof be required? Was there a Nitro version of the 45-70 between 1900 & 1909? Yes, the proofhouse still has their ledger as far as I now. I believe Felix Neuberger has had success in obtaining info.

Cheers,

Raimey
rse