I took my PT 1911 to the range Saturday. I ran one magazine through it and put a loaded one back in it. Handed it to my father in law and his first trigger pull was a missfire!! We ejected the shell and the primer had a dent in it. I put it back in and it fired fine. Every round after that fired fine. I was using Winchester White Box ammo. Is it normal to have light primer strikes from time to time with .45s? Is it the ammo? This is the first I've had with a pistol. Most of the time I use WWB for the range.