VaCollector,
The Woodward probably started life as a BPE as it was built in 1897. Nitro proof didn't come out until 1904. It was not uncommon for guns to have been re-prooved as nitro at a later date. A picture of the barrel flats will tell the story.
Maybe. Certainly the flats will tell the tale. However, Jeffery's 3" version, which was designed for Cordite and to compete with the 3 1/4" Nitro version, was already being tested in 1897, so the 3 1/4" version was already in existence. It's possible for this piece to be original nitro.
Nitro proof didn't come out until 1904.
Not true. Nitro proof was introduced with the 1887 rules, and many original, full nitro proof rifles were built before 1904. A dedicated nitro proof mark (NP) was introduced in 1904 as an addendum to the nitro marks already in use.
A .450/.400 3 1/4" NE proved before 1904 would be marked:
"Cordite 60grs./400grs. bullet max'm." No "NP" mark.
The naming of a specific semi-smokeless propellant (Cordite) indicates nitro proof under the 1887 rules. If the full standard charge is indicated (60grs./400grs. bullet max'm), then it's full nitro proof, not nitro for black. Early Nitro rifles in .303 were proved with Rifleite, and are so marked.
In 1904, the above mark became:
"Cordite 60/400MAX", and was accompanied by the "NP" mark. If the Woodward has an "NP" on the flats, then it was reproved after 1904.
It would be a good idea to post photos of the flats of all of these.
The UL Purdey could well be a snap action.