Where the powder charge burns in the barrel,is where the most fouling will be. When I clean my prohunter,first I clean down to the crud ring,then through it. Then I reverse the patch and go down the barrel again,and there is still some fouling in the area,where the charge set in the barrel. I work the patch real well in this area,then follow with a clean patch( both sides) and I'm good to go! Try it and see if it works for ya!