No deer there ever lived past 2 years, but some of the racks that they had from good feeding, diet would make you swear you were in buck heaven.
There are no genetics in antler growth, they have shown this time and time again.
It is like you growing your fingernails.
Um ok so if they were of the same age, diet and food source why do you suppose some racks not all racks were bigger? Genetics most certainly plays a part in growth potential, as does nutrients, stress & age.