Use a vegetable or mineral based oil instead. Olive oil, peanut oil, vegetable oil, are all candidates. Mineral oil is sold in drug stores, and some grocery stores. Ballistol is mainly mineral oil with some additives. Wonderlube is a vegetable shorening or oil mixes with beeswax. Wonder lube goes by several names, including Bore butter, and Natural Lube 1000. The stuff works well. You can mix your own lube by melting beeswax in a double boiler arrangement( put a small tin inside a frying pan that contains at least an inch of water) with your choice of oils. Take a look at the Index page at top and find the key to Stumpy's lube and moosemilk mix. Also, If you don't own it, buy a copy fo Cutch Schueltz's BlackPowder Accuracy system. Its onl $15.00, but is the best such money you will spend. He tells you in detail how to " read " your patches, after each shot is fired, to diagnose what you need to do to get the best accuracy.
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http://www.blackpowderrifleaccuracy.com/[/url]
Dutch prefers a waterless, or " dry" lubed patch, and makes a good case for it.
The only problem with petroleum based oils, is that you HAVE TO clean them out of the gun before shooting each time with alcohol. If you don't the stuff does not burn well, and simply grabs the crud and clogs up your flash channel, and nipple and causes misfires. With other kinds of lubes, Its an advisable precaution to use alcohol to clean out the barrel, nipple, flash channel, etc. if the gun has been stored for any length of time. I don't find a need to do so if I am shooting the gun within a month, or less.