That is not what is meant by grease in this application. You need something like the "lubes" used for cast lead bullets. These are more wax and fat based. Haven't looked at the formulea in a long long time but you should be able to find it on the web along with cast bullet shooting. It is melted into the fiber wad which is above the nitro powder card and under the shot. It is not applied to the bore directly. However it is really not needed for nitro loads. It was used with blackpowder to help soften the residue left by the burning powder so the following loads would be able to push out the excess debris. The properly sized nitro card is all the seal you will need. Of course my question is why would you want to go backward in technology when the modern plastic wad technology out performs the best of anything you might do with the fiber wad system? Keeps it simple too.
