Wow, how much do those things weigh?

The article mentions "line breeding" to get antlers of that size by breeding males with huge antlers to females that have fathers/brothers with huge antlers. I understand line breeding to be breeding within a family line (inbreeding) to enhance certain characteristics, like antler growth, but the down side is that it also compounds the negative characteristics. If the family has bad feet or poor milk production, then the resulting offspring has the potential to have really bad feet or milk production. It would be interesting to see the offspring of that buck crossed with either whitetails from the southern states or even mule deer. I feel there would be some great heterosis (hybrid vigor) but maybe someone knows better?