The 500 Jeffery is a very stout round indeed. It shoots a 535 grain bullet @ 2400 fps for a muzzle energy of 6800 foot pounds. The 500 Nitro express shoots a 570 grain slug @ approximately 2150 fps for a muzzle energy of 5850 foot pounds.

I have a friend who uses the 500 Jeff in Africa and is sold on it's ability to really put them down for the count!