I’ve been really lucky with my ccw being 100% except for the “Taurus Incident”. In that case I got rid of the gun the next day (believe it or not Gander Mountain actually took it back). Other than that I’ve carried a Glock 26, Kimber UCII, SW1911, Glock 19, M&P9FS, and most recently, a SIG C3 1911. All of these guns have had 500+ flawless rounds of my chosen self-defense ammunition as well as varying amounts of range ammo. My C3 currently has a little over 900 rounds through it, 650 being Golden Saber.
If it were to fail tomorrow I don’t know what I would do. Would probably depend on the failure. I think my recourse would be to get the gun back to the factory and have them check it out and then maybe have my gunsmith look it over for good measure. It would have to be retested with more ammunition etc. Which is expensive. That’s the thing the warranties don’t help with, re-evaluating a firearm that has failed. I’m really glad that I haven’t had a problem outside of that Taurus mistake.