CIP max working pressure was 57,000PSI (pezio) for 7x57, 8x57, 9.3x62.
The 6.5x55 was 55,000 psi.
The 9.3x57 had no CIP max working pressure(does now, apparently), however Norma loaded it to 34,000CUP(copper crusher), however the same rifles were chambered in the same guns as 6.5x55, 8x57 and 9.3x62 - some M74 Husqvarna's even barreled/chambered in .30/06 which has a CIP pezo max of 59,000psi.

http://kwk.us/pressures.html