rscott - according to kwk.us/pressures.html site:
CIP states:

9.3x62 57 psi(pezio) 49 (copper crusher cip/cup)

According to other cartridges of this type, US made such as the .338/06IMP and .270 Winchester, the allowable pressure is 65,000psi, thus I/we are not restricted to 1925 pressure limitations imposed by Euro law. At that site, there are no SAAMI "standards" (not law) applied to this round.

I do not know what the pressures are, however, I still using brass I made for this calibre and rifle, back in 1982. It has been shot at least 8, perhaps 10 times and I am still using it, primer pockets still tight.

As to case capacity, I measured mine at 78gr. water for Fed and RP brass and 80gr. for WW, using .30/06 brass, as well as a couple factory cases from Sako I have that were fired in a Styer rifle in moose camp. Both these rifles have .454" shoulders and .474" bases.
This is the same capacity as my .375/06IMP, made with an arch reamer, I think, due to it's .460" shoulder and .471" base.

I agree, knowing what the pressures ACTUALLY are, would indeed be interesting. The ballistics I am getting out of my .375/06IMP are rather startling as well.