Your herd dynamics will be a big factor in determining whether or not calls will be successful, for you.
Around here.....having a buck respond to a grunt call is akin to asking Brad Pitt to leave Angelina, Marissa Miller, Jessica Biel and Pam Anderson .....for a tussle to gain the possible affections of a"mystery woman".
I'd take my chances with the sure things I was with if I were him, too