From an article written by Mike Hudson and published on Chuck Hawk's website:
"Instead of SAAMI, the Europeans employ C.I.P., the Permanent International Commission for Firearms Testing. A far more independent organization, the C.I.P. was founded in 1914 and does not answer to corporate American or European gunmakers. According to official C.I.P. guidelines, the 7×57mm case can handle up to 390 MPa (56,564 psi) piezo pressure. In C.I.P. regulated countries, every rifle/cartridge combination has to be proofed at 125% of this maximum C.I.P. pressure to certify for sale to consumers.
By contrast, SAAMI specifies a far lower maximum pressure of 46,000 CUP or 51,000 psi. Although this lower specification is due to concern about the allegedly weaker actions of the older Mauser 93 and 95 rifles, this anxiety is misplaced, as the original ammunition developed for, and issued with, the M-93 Spanish Mauser produced an average pressure of 50,370 CUP in those rifles. Since the Spaniards continued building M-93s themselves into the 1950s, continued C.I.P. proof testing would have uncovered any inherent weakness in the action."
Food for thought.
