Hey listen to Shed it seems like he may have more experience than me but I would like to add one thing and that is rattle for about 20 seconds or so at a time but leave some gaps in your rattling. Like rattle for five or ten seconds and then hold off for a couple and then start up again. All of the fights I have heard have these gaps of silence because one buck will gain an advatage and be pushing the other buck with their horns locked.