As an aside, if you've followed Vamint Al's finite element modeling activities, you'll have noticed he's got one that shows a highly polished chamber tends not to form sharp pressure rings, instead distributing the stretch over a somewhat greater length of wall. In another FEA he shows the additional bolt thrust produced due to polishing is only around 5%, IIRC? Not the big problem conventional wisdom makes it out to be.
Using paper clip to check for case head separation
How does this trick work? I'm assuming a 90 degree bend on the paper clip's end, then check for what? Will you feel a click or valley if you've got an imminent case head failure?
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