CAUTION: The following post includes load data generated by calculation in QuickLOAD (QL) or Gordon Reloading Tool (GRT) software is based on particular powder lots, the assumption the primer is as mild as possible, and assumptions about component, chamber and gun geometry that may not correspond well to what you have. Such data should be approached by working up from published starting loads. USE THIS DATA AT YOUR OWN RISK. Neither the writer, The Firing Line, nor the staff of TFL, nor QL's author or distributor, nor GRT's author assumes any liability for any damage or injury resulting from the use of this information or information derived from it.
The CIP, by their channel transducer method, put the maximum average peak pressure at 2200 bar (31,908 psi), with maximum individual rounds in the mix for that maximum average never to exceed 115% of that, or 2530 bar (36695 psi). Their mean proof load pressure is 125% of 2200 bar, or 2750 bar (39885 psi).
What is interesting is the bullet diameter listed is no longer common. The bullet has a maximum dimension of 8.09 mm (0.3185"), which will have a minus tolerance (not listed by CIP), but the barrel groove diameter is 8.07 mm (0.3177"), which will have a plus tolerance (also not listed). So I would expect a bullet that is about 8.08 mm (0.3181") would be close to ideal for accuracy. Your 0.322s will raise the pressure a little and probably won't be best for accuracy. However, you can eliminate the raised pressure by coating them with moly or hBN. Personally, I would slug the barrel to get its true groove diameter. The lands are slightly over 0.005" tall in this gun (bore diameter 7.80 mm (0.3071"), so it would likely be very good with cast bullets, for which you can get the diameter of your choice, and a 0.319" bullet in a cast bullet would be a good choice. Even with jacketed bullets, assuming you have the 33" long barrel, you are not going to reach 2200 fps with 200 grains, and 2000 fps is more likely, and that's still within cast bullet velocities without going to extra trouble.
I ran GRT with a 200-grain bullet and got about 26.8 grains of N135 as a starting load and 29.8 grains as a maximum load. For N133, it was 24.6 to start and 27.6 maximum. N135 fills the case a little better but burns less completely than N133. Both are good powders, and you should be able to get those in Europe easily enough.