Bear Creek has been a sponsor for years at our local Cowboy 3 day shoot. Small sample bags of their product were given to all competitors (since I'm not very competitive, we could say participant) in almost any handgun or a few rifle calibers. Between these samples and several hundred that I ordered, I've loaded 32-20, 38-55-255, 45-70-405, 45-90-300, 45 ACP, 45 Colt, 44-40 WCF and 38 Special. The bullets have been accurate and clean. They are hard. If you have unused bullets and try to melt them down, they float on top a long time like plated bullets, but as range lead they melt fine. The velocity range I use on hand gun is in 700-850 fps range and in rifle loads up to 1800 fps range. I hadn't noticed the slower velocity, but I don't do bottom end accuracy loads. About Moly coated bullets in general, mostly it is a passing/passed fad. In target and varmint rifles we got 50 to 100 fps faster velocities on the same charge and some guns shot better groups, some not (this may be a function of bullet rotation count changes). As far as erosion of barrels, your simple wet patch, 2 dry patch or any similar post shooting cleaning method will counter any residual moly/ sulfur corrosion. The BIG problem is in semi auto gas guns. The Ohio National Guard rifle team, tested them in 7.62 NATO/ M-14's by half the squad using Moly bullets and half not, for a full shooting season. They found no statistical advantage or disadvantage to them in relation to scores, wins/losses, or team position (ranking). So with the gas tube problems they gave up on them. You don't see many used in Bench Rest competition (they are a very superstitious/conservative group) and see the coating of jackets as one more variable with little advantage. And variables are to be avoided.
Bear Creek has been very good to deal with whenever I called, but that was before the craziness set in. One last note; Bear Creek has had more diameters available in odd caliber bullets than anybody else that I've ordered from. Ivan