@Black Fox:
Thats quite funny since you posted those documents.
See the 2nd one? That part with "Größte Höhe über Visierlinie" (75; 84; 82cm).
This translates into "max height (of bullet's flightpath) above your line of (aiming) sight.
Those MG rounds pass the LOS the 1st time at 30m and the 2nd time (when falling down) at 500m. Between 30m and 500m the max height above the LOS are those 75cm.
Since this is obviously not a conv of 1000m it isn't that much and pretty much reflects what Herra Tohtori said.