In addition I would suggest using real, knapped flint rather than the cut agates.There is something about successfully firing a flint lock firearm that makes participating in traditional muzzleloading so satisfying. @Rmada19801980 will need to learn some of the mysteries and I will start with one. Real black powder only in a flint lock firearm. The substitutes have a much higher ignition temperature and in a flint lock that means failure to fire or at least severe hangfires. Rmada should get a copy of @Eric Bye's book, "Flintlocks..." that is available through the NMLRA to learn a lot more of the mysteries of flint lock shooting.
https://www.nmlra.org/store/flintlocks-a-practical-guide-for-their-use-and-appreciation