Keep in mind that there is NO formula to convert BAR expressed as LUP (European/British CIP) to PSI (US SAAMI). Actual pressure testing by Armbrust, at least with 16g loads, has shown the European (CIP) loads to run pressures higher than they calculate.
The B&P 16g F2 Classic is factory listed at 9,867 psi but testing by Tom Armbrust showed it to be 10,500. Gamebore Traditional Game 16g 28gm (1 oz.) is reported to run 8122 psi but testing showed it to be 8400 psi.
http://www.16ga.com/forum/viewtopic.php?t=3428
