Thanks very much Drew. I was concerned that some folks might confuse tensile strength with the maximum pressure a barrel might withstand since both are expressed in pounds per square inch.

In that 1931 du Pont test where the capped 9" section of shotgun barrel burst at 5600 psi, did they mention what the thickness of the test piece was? What I'm getting at here is questioning whether the burst pressure of a capped barrel section which is as thick as a normal chamber would be closer to the pressures Sherman Bell reached when his test barrels finally let go.

A true sign of mental illness is any gun owner who would vote for an Anti-Gunner like Joe Biden.