It varies by soil region. For mature bucks 4 + years of age, without pouring through thousands of individual entries, I'd say the statewide average on main beam length would hover between 18-21" depending on what area of the state you are in. Longer beams being more common in areas of higher soil fertility. Inside spread averages range between 13"-16". Number of points is going to hover around 8-9 points. We don't measure tine length as that is usually not an indicator that leads you to any useful information.

I'll say in northwest AL in the upper coastal plains or plateau region averages from the DMAP properties I work with are 14.5" for inside spread, 20.185" on main beams, and an average of 9.1 points, give or take a few 1/8ths.