http://www.iremember.ru/pilots/khukhrikov/khukhrikov.html
Especially this
Why? Why "they didn`t work out"?
Statistics:
LaGG-3 IT (37mm) hit at tank 3 shells of 35 (simple - hit in tank, not in his back)
IL-2 - 3 shells of 55...
G.M. Ryabushko (HSU, 828 GShAP)
(It`s my translate...