In theory: Even a mass of good welds should still be able to be x-rayed. Each weld should be solid metal, so any gaps, voids, cracks, inclusions of a differing density, etc. should show up as a defect. (Again, this is in theory...)
So, again in theory, a properly "welded" set of twist or damascus barrels should be one uniform solid tube (conprised of iron & steel - but still a uniform solid piece of metal).
...but after 125 years...who knows ? Heck, I can "feel" a slightly "ribbed" texture to my barrels. My guess is corrosive agents (sweat from hands, elements, BP residue, etc.) have selectively etched the barrel surface. Could the same thing have occurred inside too ? Not to mention, how would one even x-ray a barrel anyway ? I've seen metal plates x-rayed, and you have the radioactive souce on one side of the plate, and a film on the other side. Source penetrates one metal surface & "exposes" the film. Unless you could get the source inside the barrel, you would need to send the x-rays through both sides (diametreically opposite each other) of the barrel to expose the film on the other side. I can't imagine that turning out too well.
...and Magnaflux - would that illustrate every deep scratch in the barrels ?
I'll probably just not shoot it...
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