How big can a whitetail get these days? With the craze in micro management, food plots and pouring supplement to wild, and high fence whitetails, this deer may not be the biggest on the block for long. Despite the ability to feed whitetails like hogs in a confinement facility, some very large bucks have come from the wilds. I flipped through the pages of Leonard Lee Rue's book "The Deer of North America" and found these statistics. In 1962 Iowa hunter Dean Coffman shot a 440-pound buck that was weighed before witnesses and a biologist from the Iowa State Conservation Commission verified the number.