I have a custom smoothbore flintlock. The best advice I got was from Jim Chambers. He said to drill the flash hole to 1/16" if all I am doing is hunting with it. He also said that if you can see powder granules in the touch hole you will get ignition. He also noted that in testing the location of powder in the pan it makes no difference where it is. I used 4f for a time but have moved on to 3f and as long as the flint is producing a good spark I get consistent and fast ignition.
