I used to clean my bores more often, ie: after every shooting session. Now I clean my regular shooting rifles at the end of the year. I figured that I'd have to shoot a couple of rounds after cleaning anyway to prevent clean bore flyers, so I just skip the cleaning. I will take a dry brush or patch to clean out loose debris occasionally. When I do the complete cleaning, I use Butch's Bore Shine to remove copper and Hoppe's to remove powder fouling. A patch or two of Butch's usually takes care of my copper buildup. For long term storage, I'll coat the bore with RIG.