Inspection of many Traditions and CVA guns will clearly show the Spanish House of Eibar definitive black powder proof mark. Likely you will also see the ammunition inspection proof mark as well. A pressure stamping on the barrel, typically 700KP/CM2, will follow this. That pressure is expressed in "kiloponds / cm2." The equivalent in PSI is approx. 9957 PSI.
It is well documented that 150 grain Pyrodex pellet loads pushing 250 to 300 grain saboted projectiles can exceed 2.5 X that pressure, often upwards of 25,000 - 27,000 PSI. These are common loads, not "unusual" loads. Not just the original Pyrodex patent, but many readily available independent sources such as Lyman's.

They are not made to be Pushed. I would keep it to 85-95grs of BP.