Well Vadjan, you must suffer the same bad luck that afflicts much of the player base. There are tons of complaints about the M4A3(76) being too tough, and hitting too hard. I personally find its about as easy to kill as the T-34 at long and short range and that it's gun is about at par with the KwK 40 on the panzer (a little bit better at long range I feel, but this may be due to the ROF), which would make sense.
And IRL, the '85 was a great gun; not quite in the same leauge as the '88, but still excellent in its own right. But it still lacked the puch to kill the Tiger and Panther at long range, even in real life it could only penertate 118mm of armor at 1000m (1056yds), which I would call short-med range.