That is a good idea.

Reason it is sort of relevant is that the .455 and .476 were used in the Thompson-LaGarde tests {along with the "Manstopper" loading} and being "big bore" handguns have reputations influenced by that T-LaG. It is interesting that the most lethal infantry forces ever fielded {German Army 1914-1918, 1939-1945} issued the "loser" cartridge in the T-LaGa tests and never once fiddled with replacing it with a supposedly "superior" caliber and for that matter, even more on-topic, a revolver.

There are a gazillion Webleys in the USA and most {?} I reckon have been converted to fire .45 ACP. About 20 years ago quite a number of excellent condition Smiths in .455 came in. Wish I bought one or more. I think the supply of .455 Webleys has about dried up now. Too bad. They are neat old guns.