I bought a metric buttload of jacketed bullets (A few orders of 20k) and have only recently exhausted my supply. Fast forward to this past weekend - I couldn't wait on a plated bullet order (through a bunch of local guys) anymore, so I called SNS casting and trucked home with 10K of their 125gr coated bullets.
They were nice enough to say "pass the word along"... So, here you go:
The coating is applied as a liquid, then the bullets are put into an oven to bake/dry. Even a thin coat keeps the bullet encased/protected. The bullets don't "rub off" any lead or residue when cycling through my bullet feeder or automated press. I like coated bullets have shot them in practice and matches without any issues and have always had good luck with them. The only thing I change is switching to a cooler powder like Power Pistol, Longshot, or Bullseye to mitigate concerns of smoke. I shoot indoors for practice almost all the time and smoke hasn't been an issue... The following video was me burning up some Longshot/SNS 125's. You see some puffs, but the camera makes it look worse than it really is.
Accuracy has been good - I mean, I can hit 30 yards plates, feel confident taking a 50 yard shot, but haven't "grouped" them (future project, maybe?) like I have my jacketed bullets.