this question comes back regular. the bullet diameter for 9x57 mauser and 9x56 mannlicher schoenauer is 9,08mm and that is .3755 iirc. it is common practise to use american .358 bullets for many years now and you will also find this in european reloading manual's. barrels may vary from .356 to .358 and I have heard about a M 88 sporter with .354 barrel. its not a good idea to use .358 bullets in a .354 barrel but if you realy have one of the .356 barrels dont worry.
I believe lee is making bullet resizing die's for the reloading press. this is a simple solution for any problem's with odd bullet diameter.
the soft .357 pistol bullet's will work fine for paper punching.