loanstar, the snort-wheeze is a sound made by a very aggressive buck. He usually make this sound just prior to either charging or fighting with another buck.
I wouldn't imitate this sound unless you know you have the biggest buck in the area out of bowrange and want to draw him in as a last resort.
IMO it will scare the bejibbers out of an inferior buck if there is a bigger buck in the area.
This is also a good sound to imitate just prior to antler rattling.