Germans 88's were plain uber
Not surprised it was such a good tank killer though, a gun that can fire to 40k straight up sure will pack a nice punch when fired straight forward, no tank in any country could stand 88 hits.
Panzer Mk4 uses a 75mm, although high velocity it's no where near the 88, don't think you should score kills at 3000 as easy as you do, no numbers though, just my thought and such judging from WW2 stories by both allied and german tank crews.
Working from memory here....and checking some numbers for Combat Mission/Forums. Data should be quite right tho.
MVs
50L60(ATG, Puma, late PzKpfw IIIs) 835m/s
75L48(many many inc. PzKpfw IVh) 750m/s
75L70(Panther, Panzer IV/70) 925m/s
88L51(AA/Tiger 1) 773m/s
88L71(ATG, KT, Nashorn, Elephant, Jagdpanther) 1018m/s
128L48(AA/Jagdtiger) 920m/s
Note that heavier projectile sustains its velocity better.
Thats why 8,8cm AA and Tiger 1 are more accurate at long ranges than
PzKpfw-IVh.
I think Jagdpanther and Nashorn had 10x magnification.
Panther and Tiger 1 8x magnification
PzKpfw IVh 4x or 8x not sure which one.
Soviet assault guns like JSU-152 could shrug off 88L51 rounds frontally at range. Tigers and 8,8cm AA had some with killing them frontally them unless firing from close ranges. 88L71 was different tho. Superb ATG just look at MV difference.
As note.JSU-152's 152mm tended to blast Panther or Tiger turrets off by brute weight of its AP shell even if it lacked in AP capabilities. Reload time was huge and accuracy was not good either, but at close ranges JSU-152 was potent cat killer and it could get close.