I just saw a Gun Digest article which was touting the lightweight rifle for hunting. 1974, I think. They were talking about rifles which were 8lb., ready to hunt. Way too much gun for the modern hunter.
I seldom fire my hunting rifles from a benchrest pedestal or a bipod (a bipod kind of takes any rifle out of the lightweight class, I would think). I'll shoot off my elbows and let my forearm touch the sandbag if I want to cheat a little. I shoot "F" class and BR rifles off a rest; the others get held. GD