I'd imagine it'd be purdy warm!
But warmer than a good ol' fashioned 1894 leev-ra gun in .357 maggie pie? With all that extra case space fer some good ol' fashion slow burnin' powder, DOUBT IT!
Really though, sounds good, but I'll stick to my .357 magnum lever action. Serious thump. Maybe old fahsioned to some, but not this rootin' tootin' cowboy action shootin' man.