Just discussed in a recent thread
http://www.doublegunshop.com/forums/ubbt...ge=14#Post31794
Bottom line: I'd definitely keep the pressure below 9500 psi, which is easy today with all the 'Low Pressure' 12g and 20g commercial loads http://www.doublegunshop.com/forums/ubbt...ge=11#Post31805

Here's data from actual pressure testing:

3 Dr.Eq. 1 1/8 oz.
Winchester Trap Load
1,202 fps
9,600 psi

AA Xtra-Lite 1 oz WAAL12
1189 fps 8000 psi

Here's the B&P data (keep in mind that 850 bar is the proof pressure for a service (using) pressure of 650 bar)
http://www.bandpusa.com/files/db_trio.pdf

Last edited by revdocdrew; 03/30/07 04:32 PM.
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