Often enough round about 500mm RHA are said about the T-72M1's armor. The L/44 penetrated it during tests (And the KE left the turret at the back) at more than 1km and during the trials in Greece at nearly 4km with the L/55 (Where it also left the turret at the back).
If I consider this your facts look much to small.
If I consider this your facts look much to small.