Creating and publishing industry standards for safety, interchangeability, reliability and quality
Coordinating technical data
Promoting safe and responsible firearms use
The work at SAAMI is accomplished by its committees. Technical excellence is always our goal and safety is always the prerequisite. SAAMI supports science-based solutions to the many issues related to firearms, ammunition and components. Information and a description of the function of each committee is available by clicking on the committee name to the left.
I think you mean CUP . . .which is "cupperous pressure." SAAMI runs a test barrel with a hole in the wall over the chamber. They put a copper plug of a specific length in the hole and fire the load.
Then they measure the compression of the plug and that provides a "number." Don't ask me how they figure the number or what the number means. I just know that 44 magnum runs 40,000 CUP and .458 Win. Mag. runs 50,300 CUP.