In Keith's book "Sixguns" in chapter XIV called "Loading and Management of Cap and Ball Sixguns", p.210, he says the following about wads:
"Next take an old felt hat, a thick heavy one, or similar heavy felt material an eighth inch thick, if you can find it, and soak it in a mixture of melted tallow and beeswax. If you do not have the wax, then deer, elk, beef or mutton tallow will do. When cold and hard, take a slightly oversize wad cutter and cut wads."
Skeeter Skelton said about the same when he reviewed the then new Colt '51 Navies when they first came out in the 70's. He then threatened to shoot anyone who tried to use his hat!! :wink: