The Eastern European weapons are designed around BALL ammunition. NATO RN types are the standard.
Most brand name RN 147 gr jacketted/plated bullets can run fine. Those with blunt nose shapes, FN, HP may not fit the chamber or need to be loaded to very short OALs for those types.
If you're using commercial ammo, ask around before you stock up. If you're a reloader, ask to buy some sample bullets before you stock up.
Hope this helps.