I still think it is a combination of age, genetics, and nutrition - but I dont doubt the stress from long hunting seasons makes a difference. I know some places not far from me with an open checkbook that are producing near booners on a regular basis - and 1 and maybe two booners. They were no different than many south AR leases - they exhibited a lot of trigger control and got plenty of age - and like my place - mid 150’s was about it. Six or seven years of seven month a year unlimited protein has added 15” to those deer.I think lack of pressure is huge in allowing a deer to reach its potential. Everyone down south hunts. There is nowhere to hide.
I used to think it was all genetics. I’m less so on that train these days.
I have a close neighbor with 1200 acres that sees zero to rarely two deer a year harvested. Bow only. It is hunted about ten days a year. It produces more mature bucks than the average ground - but not bigger. There is also a 6000 acre management area not far from me - all calcareous high lime, high ph soil. It is bow hunting by draw only with the exception of one weekend youth gun hunt. The season is open for two months. Largely open fields. It is pounded. They kill maybe three deer a bucks a year and every three or four years a 160-180 - 30 miles as the crow flies. Yes - they have much better soil. There are so many variables. But throw all the exceptions out. I would bet the average 5 yr old buck across Iowa, MN, Wisconsin, Ohio, Illinois is going to average more than 118” like our bucks across the southern third of AR