I have information that slovak army adopted the heavier german bullet or simply the production of czechoslovak Vz.23 ammo was stopped in middle war period and replaced with german heavy bullet 8x57IS ammo in Zbrojovka Brno plant Povazska Bystrica, so i assume from tests there used new sighting numbers? best regards,Andy
Thanks Andy, that would explain the need for new calibration of the sight ramp.