Age is primarily impacted by letting young bucks walk which probably has the largest potential impact on average body weight. Nutrition can be managed by a combination of food plots, native habitat management, and management of doe numbers.
One companies product, no matter which company or product, is not the driver in increased body weights.
Out of all of the bickering back and forth. The above comments are what I believe as well. Age is far and away the most important factor in deer reaching a maximum weight. Young malnourished deer versus mature well nourished deer could see a good overall weight gain. I do not see the gain being 150 lbs per deer though. Either way, if you are getting 200 pound deer in GA I would keep on doing what you are doing. Even to hit 200 pounds here in WI you are looking at a minimum of a 3 year old buck.
Your right, it takes age, nutrients good habitat, along with many other factors favorable for growth and importantly,members who know and understand the QDM concept, the history of whitetails in Ga is an interesting one and why what we've accomplished as a club in North Ga is something I take much pride in. The deer that were stocked here decades ago in our area are from five different states, WI being one of them, each chosen for and based on their generic makeup have the potential to produce large deer but their needs weren't being met. Both middle and south Ga have always out-produced the northern zone for several reasons, one major reason as I see it is more farm land and farm operations there than in the foothills region where we are and there's much better soil there. You folks in WI and the other Midwestern states have and always will always produce large deer because you have something the rest of the nation can only wish for, the most fertile soil in the nation. Of course many other factors come into play, we were seeing good growth here a few years ago then a drought hit the South and we saw a weight drop for a few years after that. The thing that really got me excited again is a last season shed one of my members picked up a couple of weeks ago, he gave it to me to have it scored, if the other side matched, and I see no reason it shouldn't have, that buck would have scored in the low 160's, while my goal is having strong healthy herds, that got me really excited again! For the record, most of the bucks we take are still in the 150 to 165lb range . In the last three years some over 200 lb bucks have been taken and one doe weighted in 197lbs