I just bought a second hand G27. I took it to the range today and had what appeared to be a misfire caused by a firing pin light strike. I was firing some hand loads at the time it happened once with me and I noticed that there was a misfired round in the box of ammo that I recieved with the gun. (both misfires are from the same box of hand loads) I was wondering if there is something I can check or replace in the gun to cure this or should I just assume bad primers and monitor the situation. I fried 20 rounds after the misfire with no problems.