My have extensively used Laser Cast 200 swc lead bullets, west Coast 200 SWC plated, and varied jacketed bullets (mostly remington 230 ball).
In my experience the lead SWC's from Laser Cast are the most accurate and the best feeders. Groups open up noticeably with the West Coast 200 SWC plated - enough that I avoid them now. The Rem ball is better in accuracy than West Coast, but not as good as Laser Cast.
The plated SWC do not feed as well as the lead. The copper doesn't skip across the feed ramp as easily (an opinion shared with me by my smith). I have had a number of feed issues with the plated bullets that do not exist with lead or jacketed bullets.
I just ordered 2K of the Montana gold bullets and have run about 100 of them (230 ball, jacketed). I would say the quality and accuracy are as good or maybe a touch better than the Rem 230 ball.
Jacketed cleanup sure is a lot better too. Given the closeness in price, I will be buying jacketed bullets in the future. My indoor range doesn't allow exposed lead bullets. But I'll still use lead for outdoors, and for accuracy work, and for competition for that matter. They feed and make a clean hole, and they're the most accurate.