How does HE damage actually work?

MrVic: First off as things change the mechanics patches ect. Once the Devs decide to release some of the information they will post up the information in the Mechanics section.
Until then I can shed some light.
AP rounds if they Penetrate depending where and how they hit can do full or lower amounts of damage also modules they hit probably modify the pure HP damage they take.
As for the bounces and Ricochets ect. Some of those hits primarily ricochets usually carry some damage to the tank do the force of the impact sometimes. Also I think
there might be some dialog miss communications currently in those messages.
As for HE rounds the armor pen matters, HE can carry some damage through most armor ratings, tho sometimes its nearly none but says it penned. The closer the HE rounds AP value is to the armor you are facing the more damage that can go through. As for the numbers on how much vs what armor values, that is something that at this time is not given out. Tho with some play testing you experiemtn and find what size HE rounds works vs what tanks. As for doing module damages its not nearly as effective at it as many think
hope that helps for the time being