We had a response on the developers regarding this source.
The developers require a source in which the initial speed is indicated for as was the case with the Leopard 2A6 and DM53 as this was displayed on the Rheinmetall Website. Thus its possible to get accurate information.
Any conclusions from the above source are only subjective. A source with the specified initial velocity is required. Indirectly cited sources are not considered sufficient by the developers.
This is because if they consider this instance and act only on a rough calculation, It will create a precedent for subsequent similar cases.