Nitro proof came in in the late 1890's . Nito proof became the norm in 1904. Unless stated by the submitter. Hence there were many guns made after 1904 that were black powder, mainly for the colonial trade.As to the numbers ,do not rely on lists ,guns may have been in stock as barreled actions for some time prior to finishing for sale . I undestand that Browning in Leige have considerable quantities of B25 barreld actions for example.Webley's as one of the largest producers of sporting guns will almost certainly have been the same
