IMO flint locks are ok if everything works . But the lock time is slow , there is a chance that the priming charge got wet , the vent hole is pluged or a spark just dosn't make it down ,the rnd ball most twists are for just dosn't have enough energy at longer ranges. I use a flint only if I have to on deer , because it is a 1 shot game and I want the 1 shot to be perfict. I use a 36 cal flint lock on squirel all the time.