Daryl,
You can see, in the photo, the Superfine Moly that I spread onto the mould ends. It works so well, in preventing galling, that I wouldn't use anything else.
I usually spray the whole mould with WD 40, for storage and when heated up again, it seems to work like when you have to break in a cast iron frypan, so that it will be non stick.

I've also tumbled some hard cast GC .30 cal bullets, in Moly and they shot well without leading the bore.