I have a different method...Both of my flintlocks are custom made, they have pins holding the barrel, so I don't knock them out, the touch hole is not designed to be removed...

About 60% of black powder is not burned, but is either blown out during the shot or left in the barrel...I plug the vent with a round tooth pick and pour some alcohol down the barrel...I then put my thumb over the barrel and turn the rifle over a few times and pour out most of this residue...I then remove the tooth pick and used 3-4 patches to dry and clean the barrel...I then soak a couple of patches with WD-40 and run them down the barrel...Dry again with 2-3 patches and run a oiled patch down the barrel...I then remove the lock and clean and oil and I'm done...