Tried one of these based on positive things I heard about them. Ran it through both bores of my O/U right after shooting and they "looked" shiney clean. Later that day when I got home I ran some solvent soaked patches thru with a jag and you should have seen the crud come out. The more I patched the more crud. Finally resolved myself to several passes with a bronze brush before I could start getting reasonably clean patches. So I ask, what good is the Tico Tool really doing?