I once shot what I thought was a large doe during muzzleloader. It turned out to be a shed buck in December. It was in very good body condition and fairly young so I am not sure what caused the early shed. Dog found this shed with over a 6" circumference base a few years ago. I never saw it while hunting or on the trail cam, and have never taken one with this kind of mass. Note the pen in the pic for scale. G2 is over 9", and G3 over 8".

[Linked Image from i.imgur.com]