Doug Knoell BPBL-3 Black Powder Bullet Lubricant was developed specifically for shooting grease-grooved lead bullets using black powder. It also works well with smokeless powder. Other uses include lubricant for paper-patched bullets, muzzleloading round-ball patches and case sizing. Available in bulk only. This lube is especially popular in California, where it was designed and tested. Comes with complete directions.