Brent: what is the end-of-chamber wall thicknesses of your 2" and 2 1/2" guns? And DOM?

Under the 1954 Rules of Proof 2” chamber guns MAY have been proved for 2 3/4 tons = 8,193 psi max. service load. Vic is looking into it.

John Brindle, author of Shotgun Shooting: Techniques & Technology published a review of Proof and Service pressures in Part 5 of his series in The Double Gun Journal, “Black Powder & Smokeless, Damascus & Steel”; Volume 5, Issue 3, 1994, “Some Modern Fallacies Part 5”, p. 11. His estimated post-1954 but pre-CIP standard pressures by LUP converted to piezo transducer PSI did not include 2"
12g 2 1/2" Standard Service = 6,800 psi; Max. Service 8,800 psi

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