[Mobhack]

Why not look at the gun's data?. It is available right there in the info screens for you to read, after all. See the Game Guide, "Encyclopaedia screen" link, in the second page of info's description, where it describes the values. (The unit info screen uses the same layout as the Encyclopaedia).

It uses the sabot round for its AP round. Sabot max range is 24 hexes, so it will fire shot to about 24 hexes, or 1200 metres. Naturally, as penetration falls with range, at the far end the penetration may be too low to make the shot worthwhile, and the game is set up to use HE (if available) in that case (It may get a track disabling hit).

Cheers
Andy