Hey There TL
Makes perfectly good sense to me. I shoot a pair of Kirst Konverted 1860s with 5 shot cylinders and they are just great!! And, your rationalization also makes perfect sense.
Colt did not convert anything to 45 Colt cartridges. For the same reason most of us who worked in the trade didn't convert 1860s to 45 Colt. the cylinder walls were/are just entirely too thin. Bad Joss there. However, it is known there were several 1860s converted to 45 Colt by Gun Smiths around and about. Not all that common, but there were a few. And having both sidearms the same caliber makes perfect sense as well. I do further pursue that goal by shooting Cowboy 45 Special in mine.
My pair are also the Saber River Konverters by Kirst which look UBER KOOL and go well with my factory laser engraving by Pietta. I did, however, remove all that extra barrel out in front of the Ejector Assembly. Just excess weight ya know
Be careful out there!!
People are Hazardous to yer Health
PS: Near forgot (actually did), besides, the only really safe way to convert to 45 Colt is a correct size cylinder is by converting to 5 shot. As above, with 6, the cylinder walls are just entirely too thin.