The nutrients and minerals can only do so much. I have seen as many big bodied, small racked bucks as small bodied, big racked. It takes age, nutrition, and genetics to get both. Imagine what your buck would look like two years from now(he looks to be 2 1/2). He would have been close to 300 lbs and probably scored about 140. I shot a buck last year about that size and got 120 lbs of meat back even with one bad shoulder. Happy eating.