I'm a mechanical engineer, not a metallurgist, but I asked the metallurgist at my last job specifically about 416 in suppressor applications. This was when I was building form 1 cans back in my free-state days in NC. I think what I'm talking about would mainly be a problem at high rates of fire or in full-auto applications where you have severe temperature ratcheting. But I have seen easily identifiable wear on hardened 17-4 baffles even after just a few thousand rounds of short-barrel center-fire use, whereas I can't see anything on the muzzle. It might just be it's more uniform and harder to identify though. You do not see 416 being used in machineguns or high-rate-of-fire applications as far as I know, in fact some early M60s had stellite-lined barrels.