Moly was hot about 5 years ago. I fell in this racket too. but now moly is on the down side of poplarity.

People were moly'ing thier barrels when totally clean, and then moly'ing the bullets. Mix'ed results came out of it. Only way to benefit was to not strip out the moly in the barrel. People started noticing its slightly hydroscopic. Its messy, its a big hassle to moly your own bullets. Load data in books is pretty well useless. You can go 1 to 2 gr higher some cases. Snipers were liking it because of cold bore performance. But to keep your consistent performance, you can't strip it out of your barrel.

But in the end most of us decided the amount of effort wasn't worth the gain. And I went back to naked bullets.

If you new to reloading, don't do it. If you like to experiement and have some good loads already and some experience under your belt. Go for it. You may or may not come to the same conclution.