Tom, I hunted in Benton County for many years, before the population got high enough here in Union Co. The deer definitely average smaller here. I killed a doe with a button fawn this year that wouldn't have made over 65-70# live weight. I was in a club in Tippah Co, just to the north, for several years, and the biggest buck taken while I hunted there was just about P&Y, and no 200# deer were killed out of hundreds checked in. I think it's the soil fertility, or lack of it. The area was farmed to death by the preceding generations, and eroded down to the red clay subsoil. I've given up trying to grow a decent garden. I think maybe the National Forest land in Benton must not have been farmed out, so the soil is better. Benton Co. has the lowest human population in the state, and there is not a single red light in any of the towns in the county. Rural defined.
I did kill a 200# deer in Union about 30 years ago, but it was an exceptional buck with a long drop tine and a couple of stickers.