Talk:Damage 2.0/@comment-24085284-20131224193332/@comment-151.226.80.153-20131224195709

Heavy Gunners have 500 armour, where most light Grineer have roughly 100. Your viral weapon is trying to damage their health but is being stopped by the huge amount of armour. Corrosive damage deals extra damage to armour, so since the heavy gunner has more, it does more damage to them.