I live not far from the Skyline Drive in the Shenandoah National Park. The park is known to have some of the largest bears on the east coast, and no hunting pressure. The bears eat very well, don't have to worry about being shot and are very easy going around people, a little too easy going in my opinion. Although it is hard to judge their weight most of the time because of the fur, I have seen many 500-600 pound bears in the park. I have also seen a few that if not 700lbs were awfully close. The reason that you don't hear of them being shot is because they got that big from being smart and not making many mistakes. I would venture to guess that they are shot, but not in season, so it is kept quiet. Occasionally one of the big ones comes down off the mountain out of the park, and they get shot during bear season, but I don't remember the last time that happened. For those that have never seen a BIG black bear, once they break 500lbs, that is a big animal!
I think you will find that a 700lb black and a 700lb grizzly are the same size billy_56081.