First off using this method you can hit anyone in 1-3 shots.Take your sights and line up your first shot where you think you will hit them...now take your cursor and put it on top of the tank.
Now fire at the tank...your tank will rock back and forth...so without moving your cursor put your sights back onto the tank where you just fired(you know this because your cursor was stationary)
Now at this point your cursor should be on top of his tank and your shell should have landed somewhere.
This time don't move your joystick..move your cursor to where the shell actually landed.
Now you have a pinpoint location of where to fire.
This may sound confusing but it's simple as it gets.
http://bbs.hitechcreations.com/smf/index.php/topic,269006.0.htmlPictures of where to aimThis is the quick way to learn ranges...but eventually you wont need to use this trick unless your shootin off uneven ground.