On loading and running these revolvers, listen to Daryl on the topic of chamber bore VS groove diameter.
I've touched up a few cylinders which had burred chamber mouths which sized balls under groove diameter. I've also gone as far as reaming cylinders which had undersized chambers.

For fun it might not be necessary to ream cylinders, but some attention can greatly enhance accuracy.

I use real black powder only. No substitute.
I also cut and grease my own felt wadding. Felt can be sourced via McMaster Carr or other supplier, or just order wads from Track or October County.
Also I've replaced and/or upgraded the nipples on many of these revolvers. At least remove all of them, inspect/clean/deburr/grease and reinstall.

Cheers
Tinker