I mostly believed that rattling was a waste of time where I hunt but, this year, I took a set of antlers with me on one hunt figuring it couldn't hurt as I hadn't seen a deer all year. I went through a couple sequences, about one every half hour, where I'd bang and grind them together and rake some of the branches that I could reach from my treestand. I went for 15 to 20 seconds each time. The first two times, nothing happened. On the third time, I'd no sooner hung up the antlers and I could see a deer coming through the brush uphill from me. He walked DIRECTLY to the tree I was in, looking and smelling but never giving me a shot (he was facing me the whole way). Finally, when he was about ten feet from my tree, he got wind of me and snorted and ran off. At about 30 yards, he stopped to look back, and I drilled him. 8 point with a 16 inch inside spread. Not a giant but the best I've ever killed. What I learned from this:
1. If you aren't seeing anything, give it a try, it cant make things any worse.
2. When you rattle, be ready for anything from the moment you stop.
3. One moment can change a whole season...tho I suspected this already.
Hunting: 10% skill and 90% location.