Solax thats a good question? I don`t really know the anwser. But i do know that a couple of yrs ago my brother and i watched a nice 2 1/2 yr old buck come into a small field about ever afternoon we did notice that the main beams did grow a lot faster than the rest of the rack, as a matter of fact I don`t think this deer grew any points untill late july but the deer did become a nice 8 point in about two to three weeks time once the points started to grow! But the points were not very long?