I have built about 15 full stock and half stock muzzle loading rifle stocks from scratch, plus 4 more from semi inletted stocks, as well as finished 6 semi inletted stocks for bolt guns, and I can tell you, it's not an easy project to do well if you don't have the supervision and help of someone who knows what he is doing. I was fortunate to have the guidance of a fellow who had built about 75 ML rifles from scratch at the time I started learning.
I just hope you don't tackle something well beyond your skills and waste a bunch of time and effort on a cobbled up monstrosity. I would start with a semi inletted stock blank first, just to get a feel for what you have to do to get it to look right. You will find that every time you do one, you make fewer mistakes you need to correct and you learn to cover up those that you make better.
Here's a pic. of one I built about 15 years ago, a .45 cal., iron mounted southern mountain rifle. I bought the trigger guard, butt plate, trigger, barrel, breach plug and lock kit. All other hardware, including sights, barrel tenons, escutcheon plate, thimbles, nose cap, toe plate, I made myself. I bought the rough flame maple stock blank, band sawed it out to rough form, inlet the barrel, lock, triggers, drilled the ramrod hole and shaped it with saws, rasps, files and sandpaper. Then I finished it with tung oil finish and browned the metal in a browning box. It took about 40-45 hours to complete. Probably half of that time, perhaps a bit more, was spent on the stock. I also lapped and choked the bore.
