I have never shot an elk but I did shoot a large red bull once who just didn't seem to see the fence lines around the farm we lived on. To call him we yelled: "Hey, Homer." He usually came. But he got so bad about tearing up fences to get to cows in our other pasture and the pasture across the road, which belonged to a ****ed-off neighbor, that we decided to put him in the freezer. So, I just went out with a .30/06, yelled "Hey, Homer" and when he trotted over I shot him dead center of the chest. He dropped like a sack of sh--. I don't know if this will work on elk, but it may be worth a try.