Larry,

I have some questions, if you don't mind...

Originally Posted By: L. Brown
So . . . we start with the fact that there weren't even any common proof and service pressure standards for the old 2 5/8" guns and ammo

This is prior to 1926?

"OK, this proof level and service pressure are reasonable for 2 5/8" 12ga guns; these higher levels for 2 3/4" guns."

This is shortly after 1926? What exactly were the first service/proof pressures for 2 5/8 and the service/proof pressure for contemporay 2 3/4, say 1930? Those would be LUP values, wouldn't they, not psi?


...FACTORY 2 3/4" shells that exceed the velocity and shot charge levels established as standard for those guns by SAAMI.


You're saying SAAMI established standards for shot and charge levels?

... we do know that the current SAAMI service pressure ceiling for the 2 3/4" 12ga is higher than it was for the 2 5/8" 12ga.

Apples to apples? Both figures arrived at by the same transducer technology that was invented in the 1960's? I believe you've said it's currently 11,500 psi for 2 3/4 "....what psi (not LUP) would that peak pressure be for 2 5/8" guns?