Today I shot 100 rounds of Mini-Mags and 100 rounds of Federal Black Box with ZERO failures! The only difference that I can identify is that I did not clean the gun prior to testing the last time. I tested it as it was after S&W repaired it. If it continues to perform as it did today, I will be a happy camper. I can certainly live with an occasional failure for a non-defensive weapon. I fine tuned my iron sights, red dot and laser sights. I am clearly more accurate with the optics than I am with the iron sights. I suspect that may be due to my inability to get a clear front sight focus, even though I just got dedicated prescription shooting glasses. Aging sucks!