"Classic Pressure Signs" merely tell you what the yield strength of the brass is, not if you are over SAAMI pressure.
Texas10 has your math correct.

I did a post a few years ago about this, I called all the major mfgr's and got limits on bullets. Anything less than about 5,500 fps is irrelevant to a bullet, what destroys them is RPM.

MV * 720 / Twist = RPM

Hornady V-max bullets limit is about 290,000 rpm, HOWEVER: Your barrel smoothness will play a huge roll in the absolute number.