The heaviest whitetail deer on record weighed 402 pounds when field dressed. It was taken by a Minnesota hunter in 1926 and had an estimated live weight of 511 pounds. Whitetail deer are fully grown at 4 1/2 yearNot my numbers, I am a newbie and don't know. 402 pounds isn't a deer, it is a small cow!Wow thats a big deer, are you sure about this numbers. I would thought that a deer needed at least 6-7 years to get fully grown.
I have read that by 8 (I think) their teeth are getting pretty worn out and many will die of malnutrition by 10 (I think).