Quote:
Originally Posted by Brian Dudley
Is it not generally accepted that the critical spot for checking wall thickness is 9-10 " from the chambers?
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That may or may not be generally accepted, a barrel could have a thin spot anywhere along its length. A thin spot could have been caused by a myriad of reasons such as repairs to bulges, dents or even when it was originally manufactured. Here's a generic drawing of a 12-ga. barrel showing wall thickness contour along its length (all barrels are not created equal and any other barrel is likely to be different than this example), a thin spot relative to the pressure exerted at that spot anywhere along its length could cause bulges or bursts.
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