I use the real thing. In my opinion, a set of real antlers sounds much more realistic and you can get more volume than a rattle bag or rattle box. Plus you can scrape them up and down the tree to imitate the sound of a buck making a rub. I used this technique last season and rattled in a bruiser that stayed just out of bow range. I don't rattle very much, but I am convinced that it can and does work at certain times.