Most folks (98% or better) do not use moly anymore as we are out for extreme accuracy above all else. It differs from barrel to barrel. I had one barrel which would shoot moly fine, although no real gain from doing so. I had another barrel that I thought I would never get clean again. Others had similar experiences. I know a couple of guys who still shoot moly and do not clean all weekend. They are not beating our eyes out either. They just do not like to clean. You will have to experiment with your barrel and see if it is worth the trouble. For what gain though, I ask. What are you trying to accomplish with it.