Its an fascinating topic. I haven't done much research into the ammunition used during the war or era only the firearms themselves so far. This article led to other discoveries such as the Boxer v Berdan primer debate. Ill enjoy delving more into the history of ammunition.
Brett makes the best paper cartridges in the business. That video is no lie. I've fired over 40 rounds with the Enfield type cartridges and the last round loaded almost as easy as the first. Burton (US) style cartridges start to jam up after about ten rounds.
Lucky for me and my wallet I've found a source for swaged Enfield and Pritchett-style bullets over here in UK to shoot through my Musketoon and Pritchett rifles. The shipping for a couple of hundred 550gr bullets must be truly eye-watering now that I don't have the advantage of using military mail facilities. I fully intend to try out some of Brett's cartridges later in the year when he's back home safely.