FWIW, the KOs are the most accurate slug out of my two slug shooter 870s and also do OK from Frankenstein's first barrel and a Skeet tube.
4 1/4" ETE at 100 yards from the better, less than an inch more from t'other.
In a more reality oriented observation, every deer I shot with them was recovered within say 75 yards. Ray Charles could have followed the blood trails.
Can't ask much more than that.
Using them on BIG bears, say over 400 lbs, takes me out of my comfort zone. I've not hunted any bear, so this is just a NET opinion, but for those I'd want the Rottweil Brenekkes in 1 3/8 oz.
Or a Barret Light 50 loaded with softpoints.....