I have shot and hunted with flintlocks for 35 years, and have bagged a lot of game with them. I would use one in preference to a percussion rifle in damp weather any day - they are much easier to dry out in the field. Damp seems to wick into a percussion rifle very easily.

I remember sitting watching a bench one morning, and heard a "pop" below me. Familiar sound, I thought. Soon, another hunter came crunching up the hill. I waved at him and he came over, complaining how his percussion gun had misfired on a deer. He saw my flintlock and commented " them things don't work", and walked on. Say what???