it only works if it is so close, if you accidently hit a wall 5 feet in front of you but arent aiming at it, it wont show up, it is like 3 feet away around.
i disagree with the move part, i say just dont sit still, snipe for a part, then pistol rush. storm past your teammates tearing through them with your pistol rush. they will try to flank your sniper position, so flank them.
i am not saying snipe till you are down. i will go to a hot spot for sniping, get 1 or 2 guys. rush in then and maybe grab a dead persons gun. or i push in as a forward sniper to get their snipers early.
i don't know if it's just me or not but everytime i hit somebody anywhere with the M87 or M82 they go down! i mean i could hit them in the toe and they will drop!