First, you should double check what I or anyone else posts here on this subject. Your safety is at stake and all I can tell you is what worked well for me in a caplock T/C hawken .50.
If your rifle is a .50 cal and you use a round ball, get a .490 ball, a small round patch made specifically for use in a muzzleloader, patch lube, some ultra fine powder for the priming pan, and some Pyrodex rifle powdwer (I forget what it says on the can, FFG or rifle).
I used 60-90 grains of Pyrodex, measured in the measure that came with the gun. You can buy them at any good gun store. Dump the powder in, shake it down and rub some grease into the patch. Put the patch over the end of the barrel and set the ball on it. Use the short ball starter to start it and then the long starter and then finally the ramrod to push it all the way in, making sure it is fully seated on top of the powder.
**before this, put the ramrod in the empty barrle and mark it with a permanent marker. This way you can check it using that mark to see if it is loaded. After you load it, but before you put the priming charge in the pan, put the rod in and mark it again. You can use this mark to be certain you didn't load it twice. (this has happened)**
The next step is to put some ffffg (very fine) powder in the pan and close it. Now, unless it gets wet it should be ready to fire.
I reccomend the Pyrodex because it is less corrosive than conventional powder but you still will have a lot of cleaning to do.
Double check my reccomended charge with the manufacturer of your rifle. These are fairly generic directions and YMMV. Have fun. Any ???S email [email protected]