I can get conversion cylinders for all of these in .45LC, but the 1858 can be .38SPL and the 1851 .38LC. Given that my rifle is .38SPL I'd ideally want the pistols for being in the exact same cartridge, even so I don't necessarily want to own two 1858s and based on my investigation I'm not exactly chomping in the bit to try shooting .38SPL from a t