Lions are not hard to kill and a 22 magnum with a 40g Winchester HP does an excellent job when they are tree'd. Trick is the kill them fast enought so that they will not kill a dog.
+1
Hard cast SWC's or any of the better JHP's in a 41, 44, 357, 45 is more than adequate providing you can hit where you aim.
If you miss a kill shot with most any of the above get ready for a rodeo & prolly some torn up dogs.......my BIL lost a good one last year to a badly shot cat.
MM
