Sounds like the valve packing grease that Bruce381 sent me to test, it was heavy dinosaur oil, bentonite, castor bean oil, and some waxes.
Napthenic, cyclic, branched oils always seemed to act pretty "slick" in a gun barrel. Whether the oil has had the microcrystalline waxes cracked out of it or not is pretty much irrelevant for bullet lube purposes.
Here's what I'm basing that off of: Comparison of two kinds of transmission assembly lubricant, where the one composed of "petroleum distillates, heavy, paraffinic, solvent dewaxed" shot pretty well in several different lube formulations while one composed of "petroleum distillates, heavy napthenic, solvent dewaxed and petroleum distillates, heavy napthenic, hydrotreated" had a bad tendency to cold-start and purge. Also, comparisons between GL-1 paraffin gear oil, pharmacy-grade laxative mineral oil, and GL-5 napthenic gear oils and several engine oils showed the same trends in that straight-chain paraffin oils leave a more consistent bore. Why that is, I don't know.