HE in 7.0

Overlord: The results of the official test carried out lately
IS-7 was hit with 152mm ML-20 (SU-152) gun. Distance - 100mn. Auto-aiming. The target approximately fits the dispersion circle.
There were series of shots: 1, 2, 3 etc
Below are percentages of hit points left after the hit.
6.7, front:
1 - 100% 100% 100% 85% 70% 50% 50% 50% 34% 18%
2 - 83% 66% 48% 48% 48% 31% 31% 31% 15% 0%
3 - 85% 64% 64% 46% 46% 33% 16% 0%
4 - 100% 84% 84% 71% 53% 53% 53% 40% 24% 4%
5 - 87% 72% 53% 33% 18% 0%
6 - 87% 87% 70% 57% 43% 43% 28% 7% 7% 0%
7.0, front:
1 - 80% 80% 71% 64% 51% 36% 28% 15% 5% 0%
2 - 84% 75% 52% 39% 27% 18% 10% 0%
3 - 91% 73% 63% 50% 33% 24% 13% 13% 0%
4 - 100% 100% 93% 87% 87% 87% 68% 58% 53% 42%
5 - 85% 75% 75% 64% 45% 33% 17% 17% 10% 0%
6 - 83% 76% 60% 51% 31% 18% 9% 0%
All in all, similar effectiveness.
6.7, side:
1 - 80% 62% 47% 28% 7% 0%
2 - 83% 64% 46% 27% 10% 0%
3 - 84% 69% 48% 31% 12% 0%
4 - 81% 64% 50% 36% 17% 0%
5 - 86% 71% 51% 37% 19% 2% 0%
7.0, side:
1 - 93% 85% 77% 60% 52% 33% 30% 19% 12% 5%
2 - 91% 81% 74% 54% 46% 39% 21% 0%
3 - 85% 73% 48% 42% 33% 0% (fire)
4 - 83% 66% 42% 27% 14% 0%
5 - 91% 80% 66% 55% 37% 21% 12% 0%
1-2 extra hits are required. The reason is that IS-7 has hot 20mm side spaced armour in 7.0, it gives good protection.
6.7, rear:
1 - 88% 45% 8% 0%
2 - 86% 64% 23% 9% 0%
3 - 87% 70% 49% 35% 0%
4 - 82% 65% 44% 1% 0%
5 - 84% 65% 30% 10% 0%
7.0, rear:
1 - 60% 22% 5% 0%
2 - 88% 75% 59% 40% 23% 0%
3 - 77% 63% 51% 40% 25% 6% 0%
4 - 86% 68% 54% 34% 15% 0%
5 - 83% 65% 50% 36% 10% 0%
On average, one extra hit is required. The reason is that in 6.7 IS-7 had 60mm upper rear plate, now there are several armor groups ranging from 70mm to 100mm.
So, KV-2, SU-152, and E-100 have no real difficulties with damaging IS-7 from the front.
The impact on calibers under 120mm is more significant.