Grunt calls are about the only thing on the market that actually work. I would not go in the woods without one. I grunt about every 15-30 minutes when not seeing deer. They are mostly used and effective if you see abuck that you want to come in closer to your location. I use the True Talker from Hunters Spec. They all basically work well. You dont have tosound perfect just practice. One thing is you dont want to be too loud or too deep to sound like a very mature deer as that might scare off smaller bucks. The only time a grunt call may not beeffective is when a buck is on a hot doe. Whatever you do,a buck will not leave a hot doe. I have grunted in many bucks, they work great.