So I went shooting yesterday and today and had this happen twice, pulled the trigger on my glock 43 and heard a click but no bang. After keeping my muzzle pointed at the target for a moment I emptied the chamber and noticed that the live rounds had been hit closer to the side of the percussion cap rather than in the center. The both times that this happened it was with Blazer 9MM 115 gr brass case cartridges. Could this be an issue with my firing pin or is it more likely to be an issue with the ammo?