Max pressure is double that what is listed in the records as a max pressure. This is a one time thing and will destroy the firearm.
Why are you wanting to run max pressure loads anyways? If you are shooting factory ammo they are all going to be close to the same pressure because if they weren't they would get sued like no ones business.
So I am not really sure what you are wanting to do here.
But to directly answer your question 62,366 psi.