Used the grunt call when there was a buck and doe in the thick stuff and both stayed near by. The buck started to walk away and I blew the call and he immediately turned and came towards me.
They finally walked within range and I killed the buck with my crossbow.
The doe was nervous at first, but after using the grunt call she started feeding and settled down, which kept the buck near her.
Don't know if the grunting called the doe in, but it seemed once she heard it she relaxed a bit more.