In my 41 years of hunting big game with firearms, both centerfire and muzzleloaders, which includes Elk, Caribou, Bear, Whitetail Deer, Wild Boar, and Antelope, I have NEVER had the need for a follow up second shot. Every animal that I’ve shot with a firearm, has either dropped in its tracks, or has run off after a fatal hit to die. A follow up shot has never been required, or even do able in all my years of hunting big game.
If BH209 is more consistent from shot to shot, then it’s worth looking into. But everything I’m seeing so far, is that it’s favored for its cleanliness, and that for me is not justifiable for the cost.