I've heard that muley's will sometimes come into a fawn in destress call or other sounds.
I don't think though it's reliable enough though to be considered a successful hunting method.
It's something that will give you a bit of a laugh from time to time if you pulled it off but you'd look like a fool out there with your elk bugle trying to call in muley's. I'll put in this way. I have called in literally hundreds of elk in with an elk call....to date ZERO muleys have come in to those calls.