I'm with Hooligan. The Boretech Eliminator has made my other stuff into secondary cleaners. Every now and then, if the barrel isn't too dirty, I'll patch it a few times with Butch's or Shooter's Choice. My logic there, right or wrong, is that I want the powder fouling out of there, but I don't want all of the copper out. It seems that if I take all the copper out, I have to shoot a rifle (some of them anyway) more than a few times to get them to 'settle down' and shoot their best. There is no scientific proof behind that, but that is the way it seems.