its a great working guns, isn' it?
I love my own rifle too! if you get Norma factory ammo in your hands you will find that they have minimum dimensions. I have to turn down the base of 8x57 brass down to 11,70mm when +/- 11,90 mm is common. the CIP maximum base diameter for the 9,3x57 is 11,94mm but Norma know this problems and make the 9,3x57 with a 11,70mm base.
same problem with my old M 88 rifle in 9x57. RWS was knowing this and made the 9x57 with a 11,70mm base up to the 1970s.