I use the same in my flintlocks.

And like they said, a good sharp flint and don't over load the pan. In fact when your on the range, test this. Load just a small amount of powder in the pan and it might surprise you how fast it will go off. Over loading can cause a fuse effect. Most of my rifles like the powder on the outside of the pan, then close the frizzen, and then tilt it so a little powder trickles towards the vent hole.