btmj --- Clean your muzzleloader with hot soapy water. Think you have it clean with the clean dry patches coming out? Try the boiling water treatment... and see how dirty the patches will come out.
Boiling hot water will expand and open up the pores in the metal, just like hot water will open up the pores in your hand.
I have to find the magazine article...that more throughly explains this cleaning process. Putting a rifle back together, requires a knowledge of bolt torque, stock seating and first bolt tightening, that may not be wise in certain instances. Sometimes, when I take apart a pistol...I'm afraid that I'll leave it as a basket case, for the gunsmith to sort out and put back together.
You probably don't need the boiling water treatment anyhow, due to the advances of barrel polishing these days.