Lever is accurate. When they are trailing a doe, it's short bursts... bap, bap, bap, bap... that tells a local buck another is on the tail of a hot doe. Works well. Unless a buck isa long way off, only grunt when he is moving, not facing you after hearing it. You want to peak his interest and sense of curiosity. Make him search you out, not pinpoint your position perfectly. If he does pinpoint you, he will walk only close enough to visually check the area from a distance then leave when nothing is there. Then you've educated him. In my experince, don't get on the grunt tube like an elk bugle. Short grunts and only a few. Grunts are great this time of year. Heck, you cath'em in the right mood any any sequence will work! Have fun, Good luck!