Calling is a good tool to use. There are certin times for different calls. In my experence the the best time to call is during the rut. During the pre rut when most states are having the early bow season, that is more of a social time, Bucks are still in their bachlor groups, Doing a little sparing to establish a pecking order, This is when you want to use social grunts, Soft grunts (buck or Doe) These vocalizations are more of a courisity call, Just saying Hey Iam over here. Short soft, One or two grunts at a time, a few minutes apart, (if blind calling) if you are trying to call in some does you can also use a fawn bleat, When it comes to calling in the rut that is the time to be agressive, Now things are getting heated in the woods, Does are comming into estrus and the testostaron levels in the bucks are getting out of control. At this time you can use a combination of grunts. I like to use a doe estrus bleat combined with a young buck grunt, The young buck grunt is not so much from the gut like a dominant buck but more from the throat. This gets the big bucks attention, gets him thinking a young buck is trying to move in on his girls and he wont be liking that. you can also ues a tending grunt, That is when a buck has found a hot doe and is trying to get her to stand for him, Its almost like he grunts everytime he breaths, in and out. IF you see a buck just out of range and are trying to get him to come in and grunting is not working you can use a Snort Weezz challenge. It is a three note agressive call, Phift-Phift-Phisssssssss, sounds like you letting the air out of a tire. Primos came out with this call this year, It's called the Buck Roar. Good call, IMO Well I am by no meens an expert but I hope this might help. Good luck this season.