I recently bought myself a brand new S&W Model 29 "Classic" revolver, the gun shoots very well...when I don't flinch like a ninny, but with maximum loads it leads at the last inch of the barrel. I'm using the Lee 240gr SWC TL mold, and a max charge of 2400, and a commercial Canadian clear powder coat. In my Model 27 "Classic", with conventional groove, cast 158 bullets, I get no leading at all, even with max loads. I understand that the powder coating acts as a lube, and a heat shield, and that leading at the muzzle is a sign of not having enough lube on the bullets. How can I correct this? The bullets as cast are .429-430, after two coats of powder they are all .431-.432. Having asked, I don't intend to continue firing maximum charges in this thing, I've read that best accuracy is around the 18-19gr mark, and for general shooting I think I'll load closer to .44 Special velocities.