German off map counter battery advice wanted!

[Vesku]

Which 155mm do you mean? The US OB has three different types of 155mm arty alone. The M2 being the most common for games as that was the standard for the later war years has the same range as the german 17cm gun. So no counterbattery fire between these.

Not quite correct, M2 has 23km and K18 29,5km, big difference but the game doesn't show that.