no expert but the SPD for range in an auto is generally higher than the V MIN D SPD (Auto ish SPD) if you are going for range and you are at high DA or High altitude to may approach the Vne for that DA if you simply try to fly an IAS SPD you remembered from the flight manual for range at low DA.
Or maybe it is a use less placard?
How is oil and gas these days Brian? Say gidday to the boys from me.
Max