Correct Gil. That is why I posted the pressure. And BTW the Aguila mini-shell was reported to be about 11,000 psi

In 1935, the Proof House determined the 2” “cartridge loaded with full 2 1/2” charge may shortly be a standard British cartridge (and) proof of the 2” gun should be identical with the 2 1/2”’. Then the max. service pressure for 2 1/2" was 3 1/4 tons by LUP = about 9,800 psi by Burrard’s conversion.

The proof pressure for the 2 1/2” cartridge was lowered in 1954 to 3 tons = about 9,000 psi and for the 2” cartridge to 2 3/4 tons = about 8,100 psi

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