Yak-9T - incredible firepower (or maybe incredible tank's lack of armor?)

[swiss]

Originally Posted by majorfailure

So while in real life it is usually necessary to hit a tank many times with small projectiles until some serious effects are achieved

Uhhh - no.
What makes you think that is the case?

That is where the changes need to be made -NOT EVERY PENETRATING PROJECTILE KILLS.

Again: You can disable an AFV without penetrating it by damaging the engine(protected only by light armor) or the tracks.
Anything that goes into the crew compartment means sudden, painful death for most of the crew - and that is the only goal of armor piercing ammunition: To kill the crew.