I've been using it since was first introduved, in all my rifles, hunting and benchrest...great stuff, my BORDEN built 6PPC has over 2'000 shots in it and still shoots the same as the day I got it, all my hunting rifles shoot X-bullets that are moly coated by myself, stopped about all the copper and the accuracy is amazing for -bullets//the barrels are supposed to be a little dirty, that's what seals the little pores, cracks, grooves and every other mark...I still don't see why everyone doesn't use it.. I have a 22/250 that has 6'000 rounds down it and it still puts them right in the dot...give it a try with an open mind and judge for yourself...