I had a flintlock once for hunting and didn't like it.
I built a rifle from parts from Dixie. It wasn't really a kit, I just picked parts from many different pages of the catalog. I had to do lots of work on the stock, I had to inlet for the lock, I put a patch box on it. It was a Pennsylvania style rifle, .50
I must say it turned out great. I had an expensive lock on it.
I just couldn't get the thing to shoot consistently. At the range, I had 1 misfire out of 2 shots. Not good enough for hunting!
I didn't know anyone who shot black powder, much less flintlock. So after a few years I did a percussion conversion on it, which I never thought I had done properly and I was scared to shoot it.
This rifle now hangs on the fireplace at my Mom's log cabin. Looks good up there.
I later built another rifle in percussion and killed deer and hogs with it, great rifle.
This happened back in 1978. There was no internet. So, today, I bet you could get enough help on this forum to make that thing fire real good. I still like the looks of the flintlock.
God knows they were getting better than 50% ignition in 1780, or else the Shawnee would still rule Ohio.