Kevinmcc2 , i had a similar result as you had with a "light strike" with my brand new m&p bg , but i was using some older (purch in early 2014 ) Winchester white box stuff , but the funny thing was i also have some primers that look just like yours that did fire that i kept and brought home to study , i fired blazer`s in brass and alum cased , federal`s and even the 100 gr hpr ammo and had no light strikes with any of those ,, just the wwb ammo . But i was also switching back and fourth with my 9mm sccy , it was a break-in range session for both pistols ,,, so i could of hesitated like you did when the ftf occurred !