Hi, I am new to cap n ball shooting and just bought a Pietta 1851 US Marshall Sheriff 5.5" .44 revolver, polished steel, fits/points very well in hand. Someone challenged my choice stating that this revolver is not a Navy because it is not .36, and not worth much from a history point of view, i.e., it has no known battle history to be proud of. Please help me in researching the history of this model, if any? Thanks.