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Shoot it. It's of no use to you if you don't shoot it.

I wouldn't even worry about the headspace until you have been given a reason too, especially since you know the rifle came straight from the...

A simpler way is to just shoot it, and if you don't get a case head separation, then its fine. I could count the .303's that have matching bolts I have seen on one hand.
Once you've shot all your...