I keep hearing this thing about "Put your curser on the cross-hairs then press F8 and it range finds the target. If someones pulling my leg, oK, but if that's real....it don't work on mine.
not much of a GVer but here goes....
mouse marking 101
one "trick" is to put your mouse on the cross hairs and hit "H" This locks the mouse on the crosshair. By hitting F8 and using the arrows to move around in the view, the mouse still points to the cross hair spot even if you move your head enough to have the crosshair disappear off screen.
trick two is to get your self into position and fire a ranging shot. Watch where the round lands, place your mouse on that spot and lock it with the "H". When another tank rolls/spawns into the same general area move your gun to put the mouse on him and fire. The range is close enough that you should be able to score a hit first shot.... unless your aim is as bad as mine