HUNTINGsmart! USA Knowledge Base
Module 06 - MUZZLELOADERS 101
With flintlock muzzleloaders, the igniting spark is the result of the flint (a sharp piece of stone held tightly in place by the cock) hitting a steel plate called the frizzen.
With caplock (or percussion cap) muzzleloaders, a spark is produced when the hammer strikes a percussion cap that is coated in an explosive substance. When the trigger is pulled, the hammer hits the cap and sends a spark through the nipple, which lights the main powder charge and fires the ammunition.