A few things you need to be aware of if you plan to use the brass tubes. The tubes are not easy to extract. I've never used them, but from what I have read, some people use a piece of stiff wire with a slight hook on one end to grab inside the touch hole. You will need a bullet with a heel that fits inside the case mouth. Perdersoli's Sharps bullet will do that, but you'll need their mould. Also their bullet is very heavy, around 500 grains. Other ring tail bullets may not fit. Regardless, you're going to need a mould. Slugging your bore is a good idea. Hopefully you'll find that you groove/groove dimension is .540. Mine is and I use a .544 xmas tree bullet , 30:1,which ensures a good gas seal. I initially made my own paper cartridges but quickly moved to Charlie Hahn's cardboard tubes which have an inside diameter of around 1/2". He makes them in a variety of lengths to suit your chamber length and bullet. Moose Moulds makes a ringtail mould that works nicely. Finally, you may find that the action on your rifle will bind up from fouling caused by a poor gas seal after as few as 4 or 5 shots. The permanent fix for that is to send your rifle to Charlie, or Larry Flees for a modification to fix that. You won't be sorry. There's info about that and Charlies tubes here. I also suggest the N-SSA Skirmishers forum at
www.n-ssa.net. The guys there are very helpful and I've been a forum member for around 20 years. One last think. Start looking for musket caps NOW!!!!!