Chads right, to me it looks tacky when a bolt is left uncoated. From what I have found you need about .0015 on each side of the bolt to run smooth without binding. I see most stock remington raceways run .701-.7025 dia and stock remington bolts vary. Just have one today on a SA run .693 and a LA run .697. Never ran into a stock remington that was tight after coating. Custom actions yes, you just need to be aware of it and adjust your gun when spraying the cerakote so your getting a lighter coat but coverage still on the raceways and dont get a heavy finger on the bolt either. So colors of cerakote seem to go on and be thinner then others.
Casey