My favourite stopper is a 577. I've used a 3" and the 2 3/4"/650 but I prefer the 2 3/4"/750. It has the same ME as the 500 with a much larger bullet and the same recoil. Not a long range rifle, 100 yds. max, but what you need for being up close.

I also am a fan of the 450's, particularly the 450/ 3.25. The 400 is as low as I would go for Lion, Buff or Ele charging distance.

I also have used a 9.3 extensively in Africa and NA but would choose a 400 if I had a choice for DG. I wouldn't feel under armed for anything but Ele and Buff with the 9.3 though.