I have been reading in the archives and have seen multiple people talking about 500 S&W's chamber rating actually being 60,000 PSI rather than 50,000 PSI. Is this true? All of the load data I can find is for 50,000 PSI so I wanted to check. It'd be great great if 60,000 is the actual rating but I don't know if that's true. Any help would be great.