You should educate yourself with every part of that gun. Back in the day, people grew up with hand built guns and maintained them themselves. You know how to field strip the gun but I always went further than that. Even in the army I went further. I have an 1861 rifled musket now. It was in horrible shape when I got it. First thing I did was tare that gun apart to it's core.getting blue stuff, chisels, and magnifying glasses out now, wow, I thought my early dove season was over!
Looks and works pretty good now. I can hit the paper out to 50-75 yards but the 150 year old rifling has seen better days. I'm hoping a relining of the barrel by Bobby Hoyt will put this gun back in the 10 ring at a hundred yards. BTW, the other gun I shoot is a Pedersoli flintlock. I bought that gun in unfired condition from another forum member. I took it completely apart the day I got it. Don't be afraid, jump in, there's nothing in that gun you can't fix one way or another. We'll be here to help!
Neil