So, I have a ASM Colt Walker and a Pietta 1851 Navy .36 on it's way. Loading caps has always been a major pain, so I got poking around on Thingiverse. Thingiverse is a website of 3D models that people have designed. I have a 3D printer so I'm going to punch out a handful of these things. Someone even made a carrying case for several of them.
https://www.thingiverse.com/thing:2105355
https://www.thingiverse.com/thing:2105355