My neighbor shot a 602 pounder this morning. My ole man's 550 pounder was aged at 6 and my 400 was aged at 4.
I'm guessing a 600 must be around 8. Don't have a clue what a 780 would be. You would think they would start going down hill around 8 years.
Bears have it perfect in our area, they get all the benefits from the abundant food in central wi, and don't have to deal with winter. Its also a hard place to hunt them because all the food.