and another thing is ur fps and ping if the ping is over 200 might be a problem and the fps is below 38 it will definitely cause the game to lag and u will not be able to attack or target players properly it might seem that ur attacking properly but ur not and other players can see ur tank lag which in my opinion sux.

aah i hat when this happened its mostly due to laggy connection try closing background apps and other webpages using ur internet and reloading the game this helps me alot