using moly for bullet a lubricant coating is a very good idea, and any/all of the bad things you have heard about it are not true ,,,, they are just old wives' tales ,,,, ((but better than an old girl-friend's tail))
an even better projectile lubricant coating is NP3, from ROBAR companies in Phx AZ ,,,, but a little pricy and there is an MOQ when you have it done ,,,,,
and I know that I will catch FLACK here with the following statement, but anyone that complains that moly or NP3 builds up in their barrel, needs to just work on their barrel cleaning techniques ,,,,,,