How bad is a 36 degree on the boxer fracture?

I broke the neck and at first the doctor thought it was a 16 degree angulation. i had a check up today (10 days later) and he says it was a 36 degree. i read online that anything over 30 degree should not be healed by a simple cast. does that mean i should choose surgery? also which position should the hand be in to reduce angulation? anything else i can do to reduce it? the nurse is inexperienced and i think the way she puts the cast on made it worse, and i am worried about more permanent damage