Check out this website and you should get the answers you are looking for in relation to which calls to use and when to use them. I saved the deergrunt soundson my home computer and practiceduntil I couldreplicate the actual sounds.Alot ofhunters grunt but have noclue as to the varietyof sounds deer make and why they make them. http://www.bowsite.com/bowsite/features/practical_bowhunter/deergrunting/deergrunt.html

Hope this helps you bag the BIG ONE!