When i got my new rifle, 270wsm. I done lots of searching for several months. Theres no proof it works, no proof it doesnt work either. But i found some people who just take j-b bore paste and give a new rifle 200 strokes with a cleaning jag (new patch every 50). Then take it to the range and shoot it. I did this and my gun shoots very well, not sure it did or didnt help.