Can NOT be done writes Ken Oehler in an Article in Sept 2006 Shooting Times.
Dr. Oehler determined this from his successful efforts to derive a model which converted electronic pressure (PSI) measurements to CUP. While he managed to make the conversion, it was only possible if the entire electronically measured pressure curve was analyzed. A peak PSI measurement (which is the normal PSI number quoted by SAAMI) did NOT contain sufficient information to make the conversion accurately.
A direct quote from the article:
Dr. Oehler determined this from his successful efforts to derive a model which converted electronic pressure (PSI) measurements to CUP. While he managed to make the conversion, it was only possible if the entire electronically measured pressure curve was analyzed. A peak PSI measurement (which is the normal PSI number quoted by SAAMI) did NOT contain sufficient information to make the conversion accurately.
A direct quote from the article:
"...there is no way to predict CUP from a peak PSI reading, and there is no way to predict a peak PSI reading from a CUP reading."
Interesting article--worth the read. Apparently Dr. Oehler is going to be a regularly contributing Shooting Times author.