I never jag. I have 2 cleaning rods, one with cal brush and the other with a one sized smaller brush. I use a patch on the smaller brush to wet or dry after brushing. I use a nylon brush with Sweets for heavy copper removeal. In between chemicals I use naptha on a patch. Cigarette lighter fluid is perfect. No residue and drys. I use non chlorinated brake cleaner to clean brushes. Cleans and drys. I finish with a clr to leave in the barrel. A bench rester showed me the light...saved time and lots of $$$.