I tried the wax this afternoon with about 20 rounds of 45 Long Colt in my Winchester Trapper carbine. The loads were giving about 1,000 fps.

There was a little leading at the breech but not much. I'm going to try again by re-melting and putting a dollop of Lee Liquid Alox in it. I think that should make it just about ideal for low velocity rounds. I'll keep the commercial stuff for my full power rifle loads. For black powder I'd mix it with Vaseline or even a molybenum grease.

If there's any more going I'll be very glad of it.