I have just installed my new barrel on build. Have installed new bolt head, firing pin assembly. Firing pin protrusion was within specs @ 0.056. Head spaced with go gauge, bolt closed. Added 1 layer of clear tape to base of go gauge to at 0.003. bolt didn't close. While i wait for my stock to come in next week, i was thinking of how i am supposed to test fire this weapon. i was going to use factory ammo to check with. My build is in 7mm08. The gun was originally 7mmMag. Any suggestions on how to test fire this weapon would be appreciated. Want to be safe even after checking and rechecking everything. We all know that Mr. Murphy is always hanging around just waiting for a chance to work his magic. and in this case a disaster.