I'll echo the above advice about the bore charge (FFg or FFFg, mine like FFFg over FFg)
Every barrel is different, you have to work up to find the sweet load.
On priming, FFFFg is the way to go, and I'd advise to not fill the pan right off the bat, but rather start small. The goal is to use the minimum amount necessary to ensure reliable ignition on each fall of the flint. Anything beyond that only slows the timing between the pan flashing and the main charge going off. Find the sweet spot and ignition will be almost instantaneous.