BORE BUTTER- from Thompson Center. A biodegradable, all natural lubricant which contains no petroleum based oil additives. Developed for both lubrication of T/C Maxi-Balls, Maxi-Hunters and patches as well as for rust prevention. Makes loading and clean-up easier. Improves accuracy and reduces fouling. The properties of Natural Lube 1000+ make it an ideal lube and protectant, inside the bore as well as outside on the external surfaces. Comes in a 5 oz. tube. No. 617309