Agreed. Probably 20 or more. When I take a clean barrel (during break-in) and fire just one shot through it, though; I can usually go from what your worst patch looks like to a fairly clean patch in just four patches - with Shooter's Choice and after having run ten strokes of a wet brass brush first. This is with a Krieger, Hart, or Lilja barrel - and not too violent of a caliber.

In most of my personal guns I use Sweet's at some point during the cleaning process just to speed things up - usually clean about every 50 rounds (after initial break-in). My .25-06 AI has got to have the CR-10 to get it clean - or it might take a month - and a little JB paste doesn't hurt either. Shoots good, though. On the other hand, I have a rifle with a Krieger barrel and another with a Jeff Lawrence barrel that just don't build much copper. Don't use anything but Shooter's Choice on these two - but only because I don't have to.

Just don't do like a buddy of mine . . . cleaning his pet .300 Win Mag with Sweet's one winter evening . . ex-wife calls. Has to drop everything and go to her house to sort out a four alarm domestic issue. The next evening he remembers the rifle. Too late. Pitted barrel.