Something I overlooked that's interesting for the subject of how well the armor penetration was of the IS-2's 122mm main-gun and didn't notice until recently, maybe you number-lovers will chew it over more in-depth than I have.
The Wiki page on the IS-2's main gun, the D25-T 122mm (M1931/37), has a table listing the various munitions and armor penetrations for the gun (references cited as the "Shirokorad A. B. - Encyclopedia of the Soviet Artillery - Mn. Harvest, 2000" and the "Ballistic Tables for Corps Guns M1931 and M1931/37 - Voenizdat NKO, 1944").
Perhaps someone here could compare it to one of their trusted/reliable sources for me, tell me if it's in-the-ballpark or completely-off (Stalinized). I'd also like to see something more comprehensive and reliable to work off of on the subject of the D25T's armor penetration at various ranges than a table off of the wikipedia.
http://en.wikipedia.org/wiki/A-19_122mm_gunAvailable ammunition:
Type | Model | Projectile weight, kg | HE weight, kg | Muzzle velocity, m/s | Range, m
Armor piercing shells
АРНЕ | BR-471 | 25.0 | 0.156 |800 | 4,000
АРНЕВС (from early 1945) | BR-471B | 25.0 | | 800 | 4,000
High explosive and fragmentation shells
HE-Fragmentation, gun | OF-471H | 25.0 | 3.8 | 800 | 19,800
HE-Fragmentation, gun | OF-471 | 25.0 | 3.6 | 800 | 19,800
HE-Fragmentation, howitzer | OF-462 | 21.7 | 3.67 | 765 (charge no. 1) | 16,600
HE-Fragmentation, gun | OF-471В | | | |
HE-Fragmentation, gun | OF-472 | | | |
Anti-concrete shells
Anti-concrete, gun | G-471 | 25.0 | 2.2 | 800 | 20,400
Chemical shells
Fragmentation/chemical, gun | OH-471 | 25.0 | | 800 | 19,800
Chemical, howitzer | H-462 | 21.8 | | 705 (charge no. 2) | 19,800
Armour penetration table:
АРНЕВС shell BR-471B
Distance, m | Meet angle 60°, mm | Meet angle 90°, mm
500 | 125 | 155
1,000 | 120 | 145
1,500 | 110 | 135
2,000 | 100 | 125
3,000 | 85 | 105
APHE shell BR-471
Distance, m | Meet angle 60°, mm | Meet angle 60°, mm
500 | 120 | 150
1,000 | 105 | 130
1,500 | 95 | 115
2,000 | 80 | 100
3,000 | 65 | 75
Different methods of armor penetration measurement were used in different countries / periods. Therefore, direct comparison is often impossible.
I'll try to get some up for the Tiger-II later, though I don't think anyone following this thread doubts/questions the legitimacy about the 88mm KwK's effectiveness.