I can vogue for the CBI!! I just got my 3rd barrel from Criterion (260 Rem Match) and it is shinny clean on the inside. They are all hand lapped to aid in the smoothing of the rifling... I don't have a bore scope to look thru it, but I can say that it looks just as good as my 22-250 barrels (which are 5 in a nickel accurate @ 100 yards) Even shooting Moly bullets in the 22-250, I don't usually have to run more than 5 patches before it's clean. Then I do the foam bore treatment to remove all the copper fouling... One patch to get the blue out... the second patch comes out spotless (pretty much). I'm moving over to HBN on all of my guns now, so clean up should be even easier going forward.