Hi,
I spent 16 years building PPC guns in the UK, all 1400 odd of them S&W based, until they banned handguns here in 1997. I've just got back into gunsmithing again, and been visiting some of my European customers. I serviced dozens of the revolvers I built upto 20 years ago, and very little wear at all, even after 10s of thousands of rounds. However they were asking about me tuning recent revolvers with MIM components, and I'm interested to know what the metallurgy is like? are they Hard and durable? or are they case hardened over high-tensile peanut butter, so they wear fast if you stone the surface?