By no means am I an expert. However I have seemed to call in several bucks with a grunt call and something to rattle. I.called one in a few years back that heard me grunting and rattling and came running in like he was ready to fight. I can say I have never noticed any dear come running to a doe in estrous call. But that is just me. This time now and the next few weeks I try to rattle and grunt about every 30-45 min. After checking all around to make sure something is not sneaking in already