I'm a very aggressive caller and I have had much success with it. The deer really seem to respond around Halloween or so. I'll grunt 5-7 times loud enough for them to hear me and shut up for about 15 minutes and call again. I use the M.A.D. Buck growl to achieve these loud grunts; I never use the growl feature though.

I've killed four decent "bucks" (racked) in my life and I attribute them all to my calling techniques. I've called in many more but they weren't shooters or the shooters didn't offer a shot. I don't believe in the "grunt three times and shut up for 30 minutes." I like to be heard.