mule deer questions

[kory1]

seen a nice big mule deer today but was a little to far for a shot and he was staring at me for over 40 minutes i tried using whitetail calls rattling and nothing worked is there something diffrent you gota do for mules ive never hunted them before ? will they come in to normal deer calls and ratteling ? going out tomorrow morning where i seen him hopefully he will be there again dint spook him he just walked away slowly