>>64409794
Make sure your round shot is properly sized so it grips the rifling well. Use a good lubed patch as well and make sure its properly seated. If you are doing serious marksmanship, you should get a long, sturdy, brass range rod so you can clean the gun every 3-5 shots (it will shoot more but you won't have shots accurate enough for long range hunting at that point). A good hunting flintlock has a double set trigger. Most pedersoli guns should have a double set. It works kind of like a double action revolver. The front trigger is the saftey the second trigger is a hair trigger. And follow-through is very very important on flintlocks. The delay on a good flint from the strike of the frizzen to shot of the ball isn't that long but its not negligible. If you find yourself anticipating the explosion too much, what helped me most is actually handgun training.
Get a handgun and some dummy rounds. Its best to have a friend load the real rounds and dummy rounds in a random order. If you don't have a friend, get 3 mags, have a handful of dummy/real rounds, randomly load them without looking then scramble the mags like a game of ball in a cup. Then shoot and try to focus on your hand movements. When you hit a dummy round, you'll very easily be able to tell if you are anticipating the explosion.
>how does this help with black powder
Any time I shoot and i'm hunting, I tell myself in my head that it's a dummy round or going to be a dud. That the gun won't go off. It might not work for everyone but its done wonders for improving my steadiness when shooting and that crucial time between the pan-barrel powder ignition.