Ive always had trouble getting my guns spotless but its really starting to piss me off. I just cant seem to get my barrels clean no matter how hard i work at it. Ill only shoot 30 or so rounds and then run solvent laden patched down the bore and then let soak for a couple hours. Followed by extensive brushing with a bronze brush, and then more solvent patches. No matter how many times i repeat this process patches still come out slightly dirty especially after brushing. Using Hoppes copper/lead solvent.