Re: "Moly" coated bullets
I have used moly bullets for years and can say that there can be a significant improvement in production or rough barrels (military guns). In match barrels, kind of a toss up.
Because it is so easy to use, I moly my bullets because it has never hurt performance and sometimes helps.
if you have a match quality lapped barrel, I wouldn't bother for now. Shoot the gun and see what you get. If vel vs load amounts are similar to published data, don't bother. However, if vel is lower or pressure high for the amount of powder used, then moly can have a big help.
Got a very tight bore match barrel that really came alive with moly bullets. Others were within a 1/2 gr of each other (coated vs non coated) and no difference in performance.
Some barrels do need to be fouled in order to settle down when using moly. I rarely clean my rifles now and if I do, don't clean to bare metal. I just get rid of the powder and copper layer (yes, the barrels will still copper foul), then stop when the patches go from blue to grey.