summary: it is complicated.
you would have to track standard issue german and soviet ww2 cartridges and do tests on them(or find manufacturer catalogue with stats). every contemporary source has its own numbers regarding muzzle velocity and best post ww2 source i could find mentions different cartridges existed (but not what kind) and range of their muzzle velocity. considering that tokarevs had also hot post ww2 version of their ammo that had 20% extra charge(czech and chinese i think), there could be also mauser with hot charges during ww2. btw lighter projectiles isnt excluded from this.