What is the highest pressure pistol cartridge and how high can we make a pistol cartridges go?

[Antihero]

It's a point of diminishing returns
Take 38 acp, 38 super and 9x23 all basically the same case capacity
Going from 26k to 36k gains nearly the same as going from 36k to 55k.

Still I wonder what pressure it would take to burst the cylinder on my buckeye sports Blackhawk with the 32 H&R cylinder.
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I would imagine the answer would be " quite a lot". I didn't even know they made one