Your point about the 125 grain bullet in the 357 having 97 % stops is correct, I believe.
By the way 65br, what load do you use to get 2000 fps with a 158 grain bullet in a 357? The only two sources I could find gave a top load velocity of around 1600 fps.
Perhaps the 357 in a rifle is an adequate bear stopper but until I saw something more conclusive I would choose something that has a more solid track record.

Royce