This is the filthest shit I've ever fired out of a handgun. Ridiculously dirty--leaves black residue all over everything. It leaded my 640 so bad that rough bits of metal were sticking out of the bore after about 100 rounds. It didn't lead the bore of my Trooper(looser tolerance?), but it left lead all over the cylinder face. I resorted to shooting jacketed bullets to remove the lead from the 640, but I could use some cleaning tips for restoring my mk.III to it's blued beauty.
Next time, I'll stick to the PPU 158 grain RNL. It was just kinda dirty, and the worst thing I had happen in 500 rounds was one partial ignition leaving some unburnt powder in the case.
I would avoid this stuff, unless you want to fill in the rifling grooves of your barrel. No joke--lead was so thick that it was breaking off in eighth-inch rectangular chunks during cleaning.