Maybe I am misunderstanding it, but you seem to have shot a buffalo with your hammer gun caliber 450 N°2 Nitro Express and a 480gr SP bullet from Hornady. If It was the case, it seemed to have worked. For this reason I don't understand the Dislike when it comes to using classic SP for hunting. Sure, you don't always have, depending on the Ammo available, the choice of an ideal bullet, but then one has to be consistent and to renounce of shooting the game. Anyone who is willing to compromise should not condemn bullets in advance. I also read something between the lines about FMJ bullets, the next bullet on the critic list.