<font color="red"> </font> Dan, moly coated bullets sure are controversial. I tried them, and decided to follow the advice from two good sources; Dan Lilja, and the fine folks at Sinclair International. I agree with them.....there are just too many varibles.
I know David Tubb, the Bergers, and several other top shooters swear by them, but feel like my own experience might offer an idea of how the "Too many varibles" could pan out.
I prepped a bore of a .308 with a moly paste, then dry patched, and shot a box of Blackhills ammo, loaded with 168 grain moly coated Sierra Matchkings. All twenty rounds were showing signs of too much pressure, with bright marks on the base of the cases, and difficulty raising the bolt handle.
Since Blackhills ammo and Remington rifles both enjoy an enviable reputation, I figured the moly was the problem. I throughly cleaned the bore with Bore Tech's Moly Magic, and followed with JB Bore Paste. Subsequent rounds show no signs of over pressure. Was it bad ammo, or the moly? I don't know for sure, but I did stop shooting moly coated bullets, and removed another varible.
The bottom line is....... how much moly is too much?
Call me simple minded (I do believe in the KISS principle), but I'll stay with conventional, noncoated bullets, until a bomb proof method of using/cleaning with moly coated bullets is widely known, and throughly documented. Here is a link with Dan Lilja's opinion of moly coated bullets.