Years ago a friend of mine passed on, leaving behind a treasure trove of high quality tools and everything necessary to repair nearly anything in the firearm field. I was one of the few people invited to go through his gear and make a donation to the charity of his choice. His wife is a good woman with a great sense of humor, something needed while living with a guy seemingly stuck in the 1860's. I was looking through his vast array of cleaning supplies and was filling a small box with the likes of old school turpentine distillate, his wife brought in a small 1/2 pint and asked me whats this "It was marked Sperm Oil"? I told her, well its not what you think it is...its oil from rendered Sperm whale fat. It used to lubricate the industrial revolution. Its from Brownells with a list of uses on the back. I started using it on all of my black powder firearms where a light oil is required, mainly in the locks and trigger parts. Its great stuff and only takes about one small drop to lubricate the entire lock assembly. Muzzle loaders perform best when only using as natural a product as possible, no petroleum products anywhere, it does not mix well with black powder. The best cleaning solution we've come up with is three ounces of Dawn Liquid dish detergent, four ounces of water-soluble mineral oil, and sixty-four ounces of distilled water. As was mentioned earlier black powder cleans up very well with hot water and soap, wiping a barrel down with our cleaning mixture between shots keeps fouling to a minimum and improves accuracy exponentially. Same goes for bullet lubes in black powder cartridges or minie balls, no petroleum products allowed. Mineral oil is accepted as a result of the coal industry, if you just go with what smells right you will find natural is better, with the exception of one of my all time favorites Ballistol, I love the stuff and a buddy of mine says it smells like old gym socks. Some of the guys do use modern lubes like Shield and Breakfree. The one modern lube I use occaisonally was developed for the automatic transmission business for an assembly lube its called Lube Guard and is biosynthetic, no petroleum although a form of wax ester. Its slick as owl #### and provides an excellent protective barrier from moisture.