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.
Have you ever re-barreled a rifle? Not put together an AR,
What if the "head space" is off? then what? You stretch a case, similar to fire form,
Think of an AR Build: The barrel sits in the upper and it "head spaced" by a an alignment pin; the bolt is a 2 piece design, mass produced.
Ever been to a gun maker's business, The guns are put to together like sexing machines, vacuum cleaners, or auto mobiles. Assembly line styled.
Go ahead, spend the money on head space gauges - it's you r money,
BTW the gauges for the '06 family is all the same gauge, so make sure you ask for one for '06 and one for a 280, just to be safe.
