Try mixing up some of Stumpy's Moose Snot lube. My bro uses it in his 10 bore musket with wonderful results- very clean shooting, with never having to wipe the bore of fouling. For some reason, it works less well in my .45 flinter.
: In a double boiler, melt 2oz chunk of beeswax, and add 8oz. of pure castor oil (mix for RC glow engines by Sig). Once hot, add in 1-1/2 oz. of Murphy's oil soap, and whip it up into a latcher. It will foam somewhat, so use a fairly large container. Once whipped and blended, pour into containers for use. I used plastic bullet boxes and tins with lids for my containers.
: The murphy's is necessary as it blends the Castor and beeswax. otherwise, they won't meld. YOu an adjust the stiffness of this lube, but increasing or decreasing the wax content. As well, a mix of 50/50 Castor and Murphy's well shaken before use, will also make a good lube. Another is 50/50 Murphy's and alcohol.
: One of these will work for you, I'm sure. The straight mixes are, of course, easier to mix up. Some guys use blends of crisco and oils or wax.