Hammer, you have entirely too much time on your hands. However, you are 100% correct. Headspace is not the boogy man, and it is not measured +/-.00001. I do not tighten my barrel nuts very tight and I always put an index mark on the barrel and frame so I can tell if the barrel moves. Guess what, when I remove and put back on the same barrel the index marks line up. ::)
If you want to drive yourself crazier start measuring your fired cases with a comparator.
Bill
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