It depends on the size of the buck if its a smaller buck and you know theres a bigger one around, DO NOT try and grunt the smaller one in you will scare him off.....trust me ive scared a few smaller bucks off by grunting at them. But if he's a nice buck give him a good grunt then he will throw his head up then sit there for a second then start walking toward you. BTW this works much better with a decoy.