I was just out at the range where I go at least 2-3 times a week. I was firing my Sigma in .40 S&W. I incurred 2 misfires which has never happened before. On both misfires the primer was hit. I have been reloading for 30 years and would like your input on what you think. All rounds before and after the two misfires were fine. Could it be just one of those things that happens, maybe striker didn't hit hard enough, by the way I keep this and all of my weapons very clean.I would like any input. Thanks