Back in the '80s and early '90s both my Dad and I were lucky enough to tag bucks large enough for us to qualify for the Maine Big Bucks Club which requires a buck to field dress at at least 200 pounds on a certified scale. My Dad's tipped the scales at 217 and mine was 225.
Also, I didn't notice any mention in any of those links of Maine's all-time heaviest buck which was taken in 1955 by a fella named Horace Hinkley and weighed 355 pounds on a certified scale (if memory serves me). Most sources say this is the 2nd largest whitetail buck ever recorded (dressed weight) with only a large Minnesota buck weighing in more, dressed (again, if my memory serves me).
A perk of majoring in wildlife biology in college is the plethora of hunting knowledge that you collect throughout your course load. One of the most important factors in whether an area can hold large quantities of animals or produce large antlers is forage.
Most universities, state schools and even community colleges offer basic botany courses and plant ID courses. Although it might not be feasable for the average middle age hunter to pay tuition and go back to college to learn hunting...