Bear Creek makes a line of lead bullets coated with a poly/moly mix of some sort. I get mine from a friend, so I can't give a good online reference for them. They are supposed to be popular with the IPSC crowd here in Southern California.
I've probably gone through 10K of the coated 200g .45 SWC in my Kimber. I've noticed two things about these bullets -
1. They shoot really really clean - I have almost no leading. I clean the gun very rarely.
2. When I used a friends chrono, the loads were running about 50-75 fps slower than the load book indicated (~840 fps). My friend says that since the coating is so slippery, there is less friction, and that you need to work up to more powder to meet major. For my purposes, slower is OK, so I stay with pretty standard loads (5.5 g W231, WLP).