Check out "Deer talk101" http://www.bowsite.com/bowsite/features/practical_bowhunter/deergrunting/deergrunt.html

It will help you to understand deer vocalizations and what call are effective durring the diffrent parts of the rut. IMO if you're going to call and be sucessful you need to know what sounds mean what and how to "put a good call together". It's all about being the deer, if you can't be"the deer" then nothing will respond and you'll likely end up spooking animals.

I've had limited sucess with ratteling. Just a little "tickling of the tine" is what has worked for me. I've tried more agressive sequences but it dosen't seem to work in my area. Buck/Doe ratios are heavy to the doe side.