Will pitch this into the info bin , for what it's worth. Have a friend from 1988 that was a Viet. era. Army sniper. (had the coolest southern drawl. ) He was perminantly cycled back to Germany at the end of the Viet. War. He was put in charge of the Army Special forces sniper weapon armory , (sniper weapons). Back then they were using the .308 Win. ctg. , and he would inspect , and maintain the rifles between practice sessions. His maintenance station was sent a 55 gal. drum of a new , teflon based rifle cleaning fluid to experiment with , to see if it could be effectively used on sniper weapons. He swabed the barrel of his personal Win. Mod. 70 .308 sniper arm with the fluid , and dryed the barrel over night. Out to the range next day and the precision sniper rifle was all over the paper , until the teflon was burnt out of the bore. Teflon is so slick , the rifling was ineffective at allowing the bullet to catch the rifling . He then went back to the shop , and as a joke , he teflon bore cleaner , swabed his sniper friends rifle bores , and invited them for a regular practice session next day. Naturally , w/o teflon in his bore , his rifle shot perfectly while his buddies rifles were accuracy poor. Oh , such bitc-ing and swearing , he enjoyed the entertainment , before he told them they were part of an official teflon bore cleaner test experiment. Of course , all went back to the range to do an official accuracy check , and some practice , to finish the experiment , and all was good. Moral of the story , high pressure rounds , keep teflon out of the bore , too slick.