Converting a full-length Mauser 98 action to 9,3X62 is just flat easy: New barrel, add a crossbolt, and add a recoil pad. If the rifle is under 9 lbs, add a recoil reducer as well. Not because the 9,3X62 is a vicious kicker, but because 290 gr bullets at 2,500 fps will move you around.
Never try to educate someone who resists knowledge at all costs.
But what do I know?