I'm new too...been hunting deer but not with bow till this year. I started rattling this week in SW IA. I have brought in 4 bucks. One 5x5 I should have gotten to shoot but Murphy's law. I more or less tickle them first (where most of my reactions happen) and rattle harder if no response in 15 minutes. I rattle every half hour to hour in the morning, lay off about 10:00, start again less frequently from 11:00-3:00 and don't rattle in the evening unless I see a buck. I was grunting too but stopped as I used mature grunt and intimidated a nice deer that was coming in. Because I don't know what size deer is coming I don't grunt unless I can see him and then just enough to get his attention. Hope that helps.

THWACK!