I agree with Scenarshooter on this one...and most any biologist worth their salt will agree.
For bulls to reach their maximum growth potential they have to be 8 years and older.
I also think there are very few bulls that "regress" with age. I think some kind of reach a point then dont grow much more. I picked 3 years worth of sheds from a Montana bull that was 330 as a 7 year old bull, about 340 at 8, about 340 at 9...and was killed when he was 10 and scored just a pinch over 340 gross. Tine lengths didnt change much from 7-10 years old on that bull, mass wasnt much different between 8-10 either.
