Just my two cents from years of guiding non-tribal members on the Navajo rez for trophy bulls, and hunting in both the White Mtns. and public lands. I've learned if you use the same bugle as every one else, the elk don't respond too much as they get desensitized to hearing the same bugles over and over with the same pitch and tone (quite a phenomena on public land hunts). You be surprised how many people use the same bugle and sound the same on public land hunts. Ask any tribal member pulling a 400+ bull on prime hunting land and see how many of them use the same call. If you got late tag after the rut, imagine all the terminator calls they will have heard.