You can also shoot a relatively new cartridge, the.45 Cowboy Special. It's about the size of a 45 ACP, but is designed for cowboy shooting. It's not cheap ammo (nothing is), but it's cheaper than 45 LC or 45 Schofield. The .45 Cowboy Special is a .45 Long Colt case shortened to .45 ACP length to let cowboy action shooters load ammo with small charges of fast-burning powder, which is not safe to use in the large .45 Colt cases.I shoot Schofield all the time in my 45 Remington Conversion, as well as .44 Russian in my 44 Mag SAA. It's really pleasant, and easy for the kids to handle, but still makes a big hole.
As of right now, neither are practical, however, since the ammo waffles from unobtainable to too expensive. For some reason 44 mag is cheaper the 44 Special, and 44 Special is cheaper than Russian, and .45 Colt is increasingly hard to find and expensive, and 45 SC is moreso.