i tried grunting at a mature 8 possibly 10 pointer yesterday, about 150 yrds away from me. he was feeding a fresh cut corn field. the grunts only perked his attention but didnt bring him any closer, frankly he could give a crap!!!
i was able to grunt at a fork to get him interested but he was spooked by something and took off.
then again i was never able to grunt anything into range. i may be doing it wrong. lol