Why pay 7$ for bore cleaner when kerosene is the same thing? I made this discovery once while in the boonies and discovered I had forgot my Hoppes and I'd just put 300+ rounds of Chi com corrosive .308 through my FAL.it has no chrome bore and the thought of all that ammonia ammo rotting the guts out of my baby sent me into fits!then as I was filling my kerosene heater it dawned on me: "this stuff smells like GI bore cleaner!" It was quite a bit thinner,so I added a few drops of 40 wt oil and proceeded to scrub the bore of my pet rifle,over the next two days I observed the bore of my pet for any tell tale signs of "cartridge cancer"I got a spot or two on the face of the bolt but the bore remained shiny as a new nickel!I took the bolt out when I cleaned it obviously. I tested it again with a Mosin Nagant carbine and some utterly hideous cold war era blasting ammo with the same results,so get out there and shoot up that junk ammo and save the good stuff for hard times! Wonder if it works on Black powder and Pydorex?