RE: moly-coated bullets
There is another problem I've heard about with Moly coating.
Supposedly the coating makes the bullet more "slick" so that when it is sitting in the cartridge in the chamber and the primer is ignited, the bullet starts forward motion before the entire charge is lit.
All of this takes place in a nano-second but it can be enough to cause uneven amounts of pressure behind the bullet.
In other words the bullet doesnt get the full benefit of the entire charge because it has started down the barrel of the rifle before the entire charge has gone off.
I'm not 100% sure how true this is but I've heard it from some fairly knowledgeable people.