Rattling started in Texas and has spread across the country with mixed success.
In well managed areas with a low doe-to-buck ratio, bucks must truly compete for available does, and rattling and other forms of deer calling are more effective. In areas where there are too many does, bucks are less competitive; basically, with so many does around, the bucks don’t have to fight.
Timing also is a factor. The most competitive periods associated with the rut are the immediate pre- and post-rut periods. Both rattling and calling work best during those times. However, even at the peak of the rut, a buck without a doe can be vulnerable to rattling and calling.