I've had several bucks respond to a grunt tube over the years, but most come in curious or cautious.....looking for the other buck. Same with rattling......they get suspicious very quickly if they don't have visual confirmation of what they heard.....at least in heavily pressures west Michigan. Don't expect it to be like an informercial on a TV hunting show, where you use their product and big bucks pour of of the brush like magic.....that is BS. If your set up in the right spot and ready to shoot, attractants can be of help....but nothing works every time and can sometimes push deer away.