Today I played centuriron mk1 and used apds shoot A Jumbo 3 times but it didnt make any sense，so I used Protection Analysis to try it again and found that armor penetration even better than effective armor 40-50mm，it still can not penetrare the armor just like I pined，I also tested kv1e and kv220 because they have the same front hull armor，and the result proved my opinion.
