Yes and No Whitetail in my experince seem to respond from longer distances and for a longer time prerut and post rut some years. Mule deer will respond very well if you spot them and can get with in 1/4 mile or closer. Grunting works well when you know where the group of does are but cant find the buck. Both myself and 3 of my hunters have taken mulies with bows in our rifle season by using grunts to draw the buck in.
hope this helps Rex
I have never grunted for muleys on a hunt but i have brought them in while duck calling I thought it was a fluke on the first one but by the time the four buck came around i started to think diffrent.
Good Luck and Great Memories