Pure penetrating shots have been a long time problem due to their resilience and persistence when it comes down to un-armored or soft targets. Although it's possible to make them explode it doesn't remove them from action until they have fulfilled their penetration value.
Instead of requesting a new feature I suggest to add Lifetime = 0 to a HitEffect group {} which when coming into effect overwrites existing Lifetime settings. Currently this does not work yet.
