Greetings!
I've never heard of the ".50 Dragoon"... Sounds like a bit of fun. Personally, I think that Uberti should quit chambering their RB Pistols for .357M, and get closer to the originals by boring them for .50 Spencer! It would be an appropriate bore, and an increase of power over the .50 Rem Pistol. Just a little more fun, too!
On your other topic... A replica Tranter / Webley .577 C&B revolver is one of my dream-guns! Solid frame, SA/DA mechanism, 4" Bbl., thumb-sized bullet or ball... I think Gary James in an ages-ago 'Guns n Ammo' {70's?} did a write up on a Tranter by that description with two cylinders: one for the stubby .577 Boxer Revolver Ctg; and another for front-stuffing with roundball, percussion caps, and a BP scoop. A 450gr. conical in that old cartridge was given a velocity of 750 f.p.s., as I recall...
In 'Handloader' Magazine issue #226, Ross Seyfried details the joys of affording {and reloading for!} a Thomas Bland topbreak revolver in ".577 Gauge"...
Wow! I can Dream...
Be Well, All!
M.T.Marfield
3-16-07