I have never had luck with either rattling or grunts/bleats/wheezes etc......

or I should say I havent had luck with any of these for about 15-20 years, back when I was starting you could rattle bucks in and I can think of 3 times I grunted bucks in, but the last few years, no luck, I am starting to believe that there is some truth to the deer becoming 'call shy'.........