The biggest deer to ever be killed is a whitetail buck that measured approximately 307 inches on the Boone and Crocket system, and was dubbed "Iowa's walking world record" in the February 2002 issue of North American Whitetail magazine. This buck was killed by a 15-year-old named Tony Lovstuen on the afternoon of September 29, 2003, during the special youth season. A muzzleloader was used, and the fatal 70-yard shot hit the midsection of the whitetail buck.
The average size of a whitetail is approximately 6 to 7.75 feet with a weight of 110 to 300 pounds. Whitetail deer can sprint up to speeds of 30 mph.