I find in my area that during the pre rut that instead of heavy rattling I only tickle the tines so to speak because during the pre rut its just minor sparing matches nothing major but during the rut I grut a few times then hit the bag pretty hard at the same time tring to sound realistic then I stop grut again then a few seconds later I rattle again I do this a couple of times then quit for a while. Hopfully I bring a buck in during my first routine if not then I repeat the same routine but not to close together and not to far apart, it can also be beneficial to throw in a doe bleat before,during or after this routine just to intice the horney/aggressive bucks a little more.