Lions do not have thick hides or large bones like a Cape buffalo. Bullets that are good enough for a large Canadian mule deer are all that is needed for a lion. A-frames or triple shocks are too sturdy for a lightly framed like a lion. A Speer 270 grain Hot-Cor probably will not open up on a broad side shot on a large lion.
Poor shooting is the biggest reason for bullet and\or caliber failures. Deer bullets are more than adequate for cats. That is lions or leopards.
BS TSX, TTSX Bullets open fast and easily, I shot too many to believe otherwise. At 300 yards a 30 180 grain TSX threw a Praire dog 4 to 5 feet in the air with 6 feet of intestines streaming.
