[PPoS]

Alright thanks for the info. I've done some calculations myself which seems to be pretty authentic, however I cannot be sure since the 170mm KwK 44 was never built (and I don't have a clue if it was supposed to be L/71).

However, let's pretend that the Germans actually built a 170mm KwK 44 L/71 tank cannon. This is how it probably would look (in game-terms):
(and this is the version I'm using)
170mm KwK 44 L/71
Weapon Class: 7
Accuracy: 17
Weapon Size: 12 (maybe 13 would be better)
Warhead Size: 9
HE Pen: 4
HE Kill: 25
AP Pen: 31
AP Kill: 0
Sabot Pen: 41 (If the Germans got hold of more resources)
Sabot Range: 90 (Kinda guessed this one)
HEAT Pen: 36
Weapon Range: 140

The 150mm KwK 44 L/38 was actually already ingame!

A German 100mm KwK 45 L/60 would look something like this:

100mm KwK 45 L/60
Weapon Class: 6
Accuracy: 13
Weapon Size: 5
Warhead Size: 5
HE Pen: 3
HE Kill: 11
AP Pen: 16 (Less than the Soviet 100mm cause this one is has shorter barrel)
AP Kill: 0
Sabot Pen: 18 (If the Germans got hold of more resources)
Sabot Range: 70
HEAT Pen: 25 - 26 (Somewhere around those)
Weapon Range: 70

These are by no means any official data, but they are based on calculations of bore size, barrel length etc.