PJ, C'moor vs PJ, Postell in .45 cal.

[Don McDowell]

Oil left hanging in the bore will strip lead. Kroil is really good for getting leading out of the barrel, but if you don't get all the Kroil out of the barrel, you'll lay a fresh batch in.
Wiping you either want the patches just barely damp (lots of folks use a potato ricer to squeez the juice out) or you need to follow up the wet patch with a couple of passes of a dry patch.