Cartridge and chamber specs can be found here...http://www.saami.org/PubResources/CC_Drawings/Pistol/10mm%20Automatic.pdf
Pressure testing info...http://www.saami.org/specifications_and_information/publications/download/205.pdf
Example of 205 10mm pressure MAP
The specific loads of the test have to fit the MAP set by SAAMI.
Here is a typical MAP as set by SAAMI
Nominal Mean Instrument @ 15 feet with =/-90 fps from test barrel
Maximum Adverage pressure MAP of 37500 psi
Maximum Portable Lot Mean MPLM of 38700 psi
Maximum Portable Sample Mean MPSM of 40500 psi
The ammunition in test (10 rounds) would need to fit this established profile.
Nothing in the sample over 40500 psi
Here is something to consider...The pizoelectric transducer system employs the transducer flush mounted inside the chamber of the test barrel. Pressures developed by the expanding gases to the cartridge walls causing the transducer to deflect creating a measuerable electrical charge. This change is then converted to a pressure reading in psi.
Systems being sold are being used on the outside of the chamber of the test barrel. The expanding cartridge is not directly acting upon the transducer as in the SAAMI testing.
Proof Pressures for 10mm are 130% minimum and 140% maximum as set by SAAMI
The formula is based on the Maximum Portable Lot Mean MPLM of 38,700 psi
38,700 x 1.30 = 50,310 psi and 38,700 x 1.40 = 54,180 psi
Minimum and Maximum
50,310 psi - 54,180 psi these would be rounded to 50,500 psi - 54,000 psi