Does your fired brass have a 'step' at the base of the neck, JohnTheGreek?

Given the M98 action, a standard 9.3x57 with handloads, can match today's weak-kneed 286gr. standard 9.3x62 ammo for speed, ie: 2,340fps.
Of course if in an area where you have to shoot factory ammo, the 9.3x62 is a much better choice - of course.