Moly coating was the fad of the day back when I shot Hunter benchrest, I couldn't justify the extra expense at the time, the fad only lasted a few years. The theory at the time was the lubrication on the ojive helped the bullet center itself on the way into the lands.
My personal belief is the bullet ironed moly into the low spots and pores in the metal, it was nearly impossible to remove. I noticed that the zero on my rifle would change slightly as the gun was fired during the course of the day with only light cleanings between relays. When your trying to hit a .0050 dot at 100yds for an X it was maddening.
Moly adds another variable into the equation when your trying to reduce the variables in precision shooting.
My personal belief is the bullet ironed moly into the low spots and pores in the metal, it was nearly impossible to remove. I noticed that the zero on my rifle would change slightly as the gun was fired during the course of the day with only light cleanings between relays. When your trying to hit a .0050 dot at 100yds for an X it was maddening.
Moly adds another variable into the equation when your trying to reduce the variables in precision shooting.