Because I accidentally ruined a CM barrel with Sweets (by forgetting that I had put it in the bore and leaving it overnight) I decided that I don't need it any more, especially since there are other, less dangerous, ways to get the job done.
For heavy buildup I have used Wipeout foam with excellent results. Generally, for my match barrels, Butches, patches and bronze brushes get the job done.
Also, I recently had good results with Carbout, on a deep accumulation of powder fouling in the grooves on an old 7 mag. barrel that had never been properly cleaned. I used a bronze brush after soaking for 20 minutes, twice.
Articles about barrel cleaning should really distinguish between hand lapped and factory barrels, since the difference in difficulty in cleaning them is considerable. My lapped stainless barrels require much less effort to keep clean, especially when shooting warm loads of VV powder.