I've got a simple answer......don't clean it.....really. At least not very often. If accuracy goes down hill, clean, but not too seriously. My criteria is pop it open, look down the bore.....can ya see daylight.....shoot. I'm 68 and haven't had the opportunity to wear out a barrel either cleaning or shooting. Of course, ya gotta remember I'm lazy and would never wear it out cleaning. Most rifles seem to shoot best with at least a somewhat fouled bore. Look at it this way....the first shot'll take out most of the crud, the second'll take out some more. Don't let it lay around and get pitted, but don't wear it out cleaning.
Pete