I've had mixed success with each call. I think it really depends on the mood of the buck at the time although I have noticed that at times you really need to be a little loud for them to hear at a distance. Last weekend I was able to use a doe bleat on a medium size 8 but it took three fairly loud bleats before he heard me and then came trotting in. I've had good success with a tending grunt at the right time of the year. Sometimes the small to medium size deer don't like to come to a low, deep grunt....for fear of getting their you know what kicked in. Just make sure that if your calling from the same location, repeat your call every 30-45 minutes in case new bucks have comeinto the area.