I have no experience in failure testing of shotgun barrels. I am a mechanical engineer with experience in instrumented testing to failure of high pressure steel pressure vessels.
The seller seems to be assuming negligence on the part of one of the two shooters by using shells producing pressures that were too high. No information is available as to what those shells or pressures were.
Acceptable pressure would be a function of barrel wall thickness and yield strength. Yield strength would not vary after the gun's manufacture and should still be adequate for loads up to and including then operational proof loads unless wall thickness was reduced.
I would suggest that the seller should have wall thicknesses in the bulge regions measured and publicize the results. This would give a good indication of the pressure level necessary to cause the observed damage and the degree of negligence, if any, of the shooter in using shells leading to this pressure.
I assume that reasonable values for as-manufactured barrel wall thickness in the bulge area are available for comparison to measured values on these barrels.
Last edited by vangulil; 08/15/16 02:56 PM.
