A good friend spends three weeks every year hunting in South Africa. Mostly cross bow, and archery now. But he has taken many animals with various rifles as well. He tells me all they use is round nose bullets. From smaller, thin skinned plains animals to dangerous game. They believe the round nose bullets penetrate better. Don't know anything about scientific theory, and ballistic tests. Just that they have been successfully taking animals for a long time with round nose bullets.