In spite of the rather ad hoc gun terminology used here in UK - bullet HEADS, the gun MECH, muzzle BREAKS and so on, and the somewhat adventuous interpretations of the Firearms Acts in a few counties, the Ruger Old Army is actually classed by the makers as a .44" calibre Black Powder Revolver, NOT a .45".

Else we SHOULD be seeing all .303" rifles and carbines as .311".

However, it is my experience that reality has little or nothing to do with much of what goes on in any particular county Firearms & Explosives Licensing Department, and rules/descriptive terms/sundy technicalities are a matter of whimsy rather that fact.

The box marking and instructions that came with MY ROA are quite clear on the subject - it is a .44" cal and nothing else.

But where I live there are other folks with identical guns that have been called .45"s.

........sigh...... .....

tac