Also, it must be limited, eversince is OP
eeeh... i dont think so. HEAT already fails to do more damage than APDS at a T-90s front (yes, i do know i picked the most badassly armored tank after the chally 2 as an example, but hey.), so i would imagine that HESH would do less than HEAT at the front of most things, except the godforsaken arty and probably the K2. so it would be a VERY limited shell relating to the situations where it could be considered OP.