The Cimmaron revolvers are not real authentic in that the 1860's are built on a larger frame than the original cap&ball Colts. That is why they are able to chamber them in .45 caliber, larger cylinder diameter. That does spoil the slim grace of the 1860 but makes a much safer and more practical gun for actual use. I had one of the 1860 Richards/Mason conversions and an 1872 open top, both in .44 Colt, which was an original caliber. Both were good shooters with black powder or mild smokeless loads.
One advantage in the Cimmaron guns is that the bore diameter matches the bullet diameter, which is not the case with original Colts nor some modern made conversions which require hollow based bullets to fill the oversize bores.
I like the Cimmaron conversions but can't escape the fact that the Ruger Vaquero is a far far better gun for less money. :haha: