Well, it hadn't occurred to me to worry about it, but if Moly is a lubricant, and the bullets are "slipperier", wouldn't barrel life be extended? At least somewhat?
I'm still getting tight groups after 4,000 rounds through an '06, and somebody else posted a 10,000+ barrel life for a high-power cartridge.
Do you shoot enough to worry about over or under 10,000-round barrel life?