I have severe erosion of the firing pin bushing - see attached.
I'm sending it back to S&W later this week for repair. I have approx. 5,000 rounds through this gun. Any feedback as to what causes this and how to prevent this would be appreciated.
Load: Federal 9 mm brass, Fed Primer, 3.4 gr N320, 147 gr BLUE (.357) bullet > PF = 133
ACTION: APEX @ 4.5#, competition firing pin - not that it matters but also APEX install front and rear sights.