Actually, Merrill Martin and Roger Johnston were looking for ways to cut leading in cast bullet rifles when they developed the NECO system of moly coating.
I run cast bullets thru a Lee sizer, rinse in alcohol, dry, tumble in my shot/moly mix for 2&1/2 hours, wax for a minute or so, and then thru my old Lyman lubrisizer with their moly lube. The lube is softer than I like, but a dusting of Midway mica helps.
This has almost completely eliminated leading in my .41 magnum and .45 LC.
The Bill of Rights, and the Golden Rule are enough for civilized behavior. The rest is window dressing. Shoot carefully, swifter...