As I recall, most loads for traditional style guns with moderate loads run around 10 to 12 thousand CUP.(Copper Units of Pressure) Highs are up around 20 thou. However, with new modern steels and in-lines it may easily be 1.5 to 2 times that.
CUPs as a pressure measurement was somewhat variable and suspect depending on methodology and a new measurement unit is often used.
There are guys who are always pushing the envelope in the name of "magnum" performance. I prefer my face the way it is, without the aid of a plastic surgeon. I saw a fellow at the range jamming four 50 grain pellets in a cheap in-line. The crack was excessive and the guy couldn't hit the dirt behind the target stand. worse, he kept blaming the powder charge as too light. I left, figured it was safer and if his gun blew, I'd rather not be cleaning up the mess.
Here in PA where shots are seldom over 75 yards there is simply no reason to use elephant loads.