I have a GAP built 223 on a remington 700 action. I only have about 200 rounds through this gun now. I took the gun out today to test some handloads. I cleaned the gun, then shot 5 rounds of Hornady TAP ammo. Then I shot 50 rounds of my handloads. No problems with any of the ammo yet. Then I decided to try some factory Laupa ammo. Well the first round with that I had a pierced primer. This is the first time it has ever happened to me. I am wondering what could have caused it? Just a hot load from Laupa? Problem with the firing pin? Is the gun safe to shoot some more?