Prior to the new Il2 being released, I knew the guns on my Il2 would not pop the early and heavily sloped T34 so I fired my rockets, one at a time.
Amazingly, I hit the tank with one of the rockets just behind the turret on the engine compartment. That single hit sprite caused the tank almost impervious to the old Il2 to die instantly.
I don't ground pound often and I have yet to reproduce it. Most of the time, I can barely hit the ground with bombs or rockets.