My question is why would you want to do that? Everybody isn't hunting "trophies". Killing deer is still enjoyable and fun. Nobody likes hunting big deer more than I do, but changing laws and regulations to force that view on everybody hunting in this state is not only selfish, but not what is best for the sport. It is actually detrimental to hunter recruitment and retention. There are things the state could do to put more bucks into an older age class, but why would we? Current regs allow people who want to do that the ability to. Current regs also allow the guy who gets to hunt only Thanksgiving and Christmas to kill whatever the heck he wants.
It is not right to legislate trophy hunting, period.
To answer your question though....simply go from 3 bucks to 1. More bucks live, therefore getting older. Older bucks grow larger antlers than younger bucks. I am NOT in favor of that statewide.