If I remember right, moly doesnt really mix with oil or grease (petro based lubes), they just act as a carrier for the moly. Some moly greases are more grease than anything. The old 'Gunslick' (Outer's?) was a graphite (micro ball bearings) in a light grease base and worked pretty well.
One of the keys for this whole process, IMHO, is to have the smoothed parts, very clean and unlubed, burnished into each other, then clean again and apply the lube of choice.
By burnished, I mean worked over their mating surfaces with just a tad of pressure applied, in this case, againt the back out the hammer. Put a piece of rubber, or even a popsickle stick, in front to break the hammer fall, cock to full, apply a little pressure and squeeze the trigger. It is important to have the works go through their travel. No problem with a hundred strokes this way.