Of all the sub-chores in the cleaning process, removing bullet-metal fouling is the most tedious and ornery.
It's not an exact science, but figure on shooting several boxes of ammo and running through dozens of cleaning patches to break in a new rifle barrel.
How To Clean a Muzzleloader with CVA
There’s nothing worse than a muzzleloader that goes “Pfffttt” instead of “Boom!” And why does it seem that failures occur most often during late-season hunts?