I still prefer speed (lots of it) mass and a proper bullet for lion...
Yip, I agree fully!
But on another note, let's be honest, we are really trying to split hairs here. What are we trying to prove? Whether we can expire the cat after 20yds or 18yds? You don't get deader than dead fellas.
Any of the calibers mentioned here will get the job done, as long as you comfortable shooting your rifle and can place the bullet where it matters.