I found this part of the article interesting. I've always understood that one should seat the PRB firmly on the powder, but the author seems to think otherwise. I'm curious as to whether he is correct or not. (FWIW, I've not noticed any adverse effects from seating the PRB firmly on the powder).
1. In a flintlock, you don't pack the powder by ramming the ball down hard on the powder charge. A flintlock has to burn the powder one granule at a time, while a percussion cap sends a flame burning or pushing its way through the powder charge, igniting lots of powder all at once. A percussion cap actually detonates the powder, much like the primer in a cartridge does today.
The flintlock was designed to start a fire that quickly ignites all the powder to create the gases needed to expel the projectile. Load the ball using a marked ramrod, so that you load to a mark you have made on the ramrod that represents where the ball just begins to touch the powder under it. (You can feel and sometime hear a grinding action when the ball touches the powder). Leave extra air between powder granules, to speed the burning process in a flintlock. Actually, there is enough oxygen in the powder itself to provide all the O2 it needs for combustion. But extra oxygen helps it burn faster. (That is the secret!)