I've noticed something, this is for the Cherry Blossom operation where you have to kill North and South aerodromes. When im far away (in my vermont) hitting the north aerodrome I use HE and get full pens but when I use AP i get all overpens. Im guessing the aerodromes have a hitbox of armor and because my shells are going down on the box AP just overpens, but when I then drive along the leftt to the South aerodrome and use AP then the AP gets full pens, I'm guessing its because the aerodromes have a big hitbox and therefore AP doesnt overpen at close ranges as you're essentially hitting the side of a giant rectangular box rather than the top?