STXRANCHMAN. You are absolutely correct. I shot this deer with my bow a couple years ago. He made pope and young with a gross of 141 and a net of 136 and some change. I had watched him for a couple of years but we never could decide on his age due to his body structure. We knew that he had to be at least 4 due to the years we had him watched him. In all the times that we saw him while sitting he never acted like a mature buck and would move off when a mature deer showed up. I just put this up here to show the exact point that you made about every buck not fitting the typical mold of aging a deer with just the body structure. You have to take into consideration everything not just the body. He ended up being 6yrs old. Still my most prized possession. He had the same body look every year, and I think that is what confused us the most. Official scorer said that this was the first time that he ever had to write a negative number on the tip to tip measurement.
The signs of age where in the pics. Most look at rack first then body size next. In the first pic, with the width in his shoulders, the size and shape of his head was what made me say mature. The second pic he is starting to sit down on his hooves, has quite a bit of white hair on his legs(some areas this works for older bucks), his hocks are staining down his legs, he has that hump above his shoulders, muscling in shoulders/neck are things I noticed quickly. I was at a ranch in northern Val Verde when a hunter killed a buck similar to this one. He was 7 yrs old with 9" inside spread and grossed mid 130's on a 6x6 typical frame.