During breeding season, you should live with a pair of sheds in your hands. Though synthetic rattling antlers are improving, the real deal packs more volume. And sound matters, especially in extremes of cover (when it's very dense or very open) and in high wind. Begin within minutes of settling into a stand with a 20- to 30-second, medium-volume shoving match. If nothing appears, get longer and louder for the next sessions (every half hour or so). Maintain this routine, but if you spot a cruising buck between bouts, use the horns to grab his attention. The key to effective rattling is setup. A buck will circle down-wind, so you must keep a fence, bluff, river, or line of dense brush on your downwind side to block his path and steer him into range.