Thanks Edgar.
I've seen dye-penetrant testing done, and have heard of mag particle, x-ray, etc. I wonder aloud if any of these be done to verify a defect on the INSIDE surface of a shotgun barrel ? Then, would a deep scratch & a small crack look alike to some of these methods ? Would localized, linear pits/corrosion look like a crack ? I did have a friend with a scope video the bores (both of them, before the honing), and although it's not a perfectly sharp video, you can definitely see this "defect." It's obvious (as were the many pits in these bores, a lot of which are gone now, due to the honing).
There are many such testing companies in the area - I should look into it.
Thanks !
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