I have a feeling you're just trolling a little.
Mostly because an elephant has an 8 feet long bullet path, and a deer or elk has possibly a 1 foot path to the heart.
A deer bullet weighs about 20% of an elephant bullet, and depends on high damage in the initial impact. The elephant bullet is being used on a beast that is what, ten times the mass of a deer, at least? You won't get a big splash when you hit an elephant/hippo/rhino/cape buff in the ribs. You are counting on blowing a hole clean through the thing, hoping for a lot of shock value, and wanting broken bones, cut nerves and arteries, and eventually, death by exsanguination.
Examine the tactics of killing.
Gophers and rodents: 50 grain bullets meant to blow the things to alpo.
Deer: Expansion and shock, intense tissue damage.
Elk: Controlled expansion and deeper hits, for heavier bleeding.
Grizz and polar: Heavier, not necessarily faster, little intended expansion, deep, bleeding wounds intended to break down body systems.
Bison: Traditional shot? through the lungs, heavy lead bullet, buff collapses and bleeds to death right there, drowning in blood.
Elephant: Shot cleanly run through the heart. damage to heart and shock from the extreme injury causes systemic shock, and more quickly than would be anticipated, loss of circulation stops the thing. Most importantly, you are NOT reliably going to make a brain shot work with a soft point. You might as well shoot through a cinder block.
keep in mind, I don't think I have ever heard of anyone taking Full patch bullets after lion. Expanding bullets are more reliable killers on soft bodied critters like lion and bear.