you should get a first clue.
You got that right, Don. He should be taking notes here, not giving advise. Somebody could get hurt.
Hancock,
Headspace is set for a given receiver and bolt when the barrel is chambered. Different bolts may have different length/geometry of lugs, and may interface differently with the receiver, causing a change in headspace. Headspace could be reset for that bolt by extending the chamber with a finish reamer, taking material off the back of the bolt lugs, or by setting back the barrel and rechambering.
Bottom line is, it’s possible for one bolt to close on a GO and not close on a NO-GO, but for another bolt in the same rifle not to do so.
