Originally Posted by
davemuzz
I suppose you could have some chamber damage....if you close the bolt, snug up the barrel, and during the nut tighting process ignore the fact that the barrel can still tighten up as you tighten the nut. I mean...this can occur. So, should this happen during your nut tightening process, you have to either loosen the barrel a tad to compensate for this, or have your wife\girlfriend grip the barrel with her teeth to prevent the barrel from turning when you tighten it down.
Of course, you could always adjust your barrel against the gauge, then unlock the bolt, tighten the nut, then re-check the headspace. If it's too tight, loosen it up and try again.
JMHO
Dave