With my new 6.5x47 I have experimented with different means for cleaning.
I bought some of these felt plugs and a jag from Brownells. You thread a felt plug onto the jag at the end of your cleaning rod, and saturate it with solvent, in my case I used T M Bore Cleaner. It really gets the bore wet.
I then ran a nylon brush thru the bore a few times, maybe 3, as it was a really tight fitting new nylon bore brush. Another felt plug with solvent, let it set for a couple hours. Lots of greenish fluid came out the muzzle on to my drip pan.
Still though, I could see copper streaks on the lands at the muzzle. So, after getting the bore dry, I used Wipe Out. First treatment overnight, pushed out with a patch on a jag, second treatment for perhaps 4 hours, patch on jag, and no more visible copper streaks at the muzzle.
Don't have a bore scope, so cannot say what the remainder of the bore looks like.
Will hit it again with a bore brush before going to work, and another treatment of Wipe Out, and see what color the patches come out when I return home.