Greetings Zouave,
The Uberti 1873 SAA cap and ball is just modified slightly in that the cylinder isn't easily interchangeable with the Uberti .45LC cartridge cylinder and of course the firing pin has a different shape to strike the nipple/cap. Parts are available and generally interchange. As far as firing, lots of fire and smoke and, after two cylinders, lots of fouling. Not a good choice for those with limited time; loading and then cleaning after use takes time. Compared to Colt cap and ball pistols, the 1873 easier to use if pulling the wedge is bothersome, but for loading the cylinders you really need that loading gizmo. (BTW, it is always an attention getter at the range.)
-d