You are wrong. As are all people saying it is the same when you damage low tiers and high tiers. It was said that it is the same for CREDITS and not XP. There was a lot of drama queens all over the CREDIT thing so Overlord at one point said that the XP gain bonus for high tiers is in effect. He also said that the bonus in credit earning was never actually in effect. So Credit wise its the same, XP wise its NOT the same if you damage a tier 10 or a tier 5. To the OP... You are driving a OP tank so the avarage XP gain for it high. Damage the big boys, shoot more. 21 shoots isnt that great for that canon.