...drawn in front of own experiences I do not think that IMR-4350 is the optimal powder for loading the 9,3x74 R (some of the faster burning powders seem to be rather the optimal powders)....

take a look on this exceptionally fine site...(for information: the N-203-B is in the burning class of IMR-4320 to IMR-4064, Rottweil R-903 to R-907; same or more velocity as with IMR-4350, but with less recoil...):

http://www.norma.cc/sortimentladd.asp?Kaliber=9,3x74R&Lang=3