Question: HE Penetration

[Warnevada]

This helps a lot, and also helps explain what looked odd with some AP fire as well.

It would be very useful if the various relationships between range, penetration number, warhead size and angle were documented somewhere. What would also be helpful is an explanation of the relationships between HEAT and APCR numbers and the various types of ammo a gun may have: HE, AP and SABOT.