When to use moly coated bullets?

[Fentonite]

Thanks for the responses, guys. I think I'll just stick with copper, since I only wanted to try these out to see how they ran. I appreciate the advice.

So.... Anybody wanna buy 5 boxes of Monilithic Munitions 130 grain (Norma Diamondline moly) ammo in .260 Rem?

http://monolithicmunitions.com/produ...0g-match-ammo/