RR
I had an old Crescent that I shot a few hundred rounds of modern Winchester AA loads through, then I shot a box of black powder loads through it. The bp was hot enough that it partially melted off a bunch of plastic residue left behind by the Winchester AAs. It took me 45 minutes with my cleaning rod and brush chucked to a power drill to get all that burned plastic residue out of those barrels. I have several muzzle loaders that have never been exposed to plastic wads and have never had any problems cleaning them with just soap and water.
Steve
