I have a Ruger New Army and an old Colt SAA ’73 and love to fire them- but I have to admit they are a tremendous pain to load those old cap and ball guns.
Terril James Herbert, one of my fellow writers over at Guns.com (who has a YouTube channel– Mark3SMLE), has a great primer on how to fix that by using a new take on the old paper cartridges used back in the 19th Century with these cap guns.