A few more questions if y'all dont mind.
I ordered a "good used" bolt and I already own .303 headspace gauges.  The bolt will not close on a field gauge if the gauge is set off center.  But the bolt will close on a field gauge when it's set dead center on the bolt face.  Is the .08mm difference in rim diameter causing this discrepancy or is it failing the field gauge?
The bolt appears to be in very good condition except for a "milling" mark behind the lug. Is this groove indeed a normal mark made during production?
Anything else from the pics that should be of concern?
Thanks in advance,
- milsurpshooter

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