RE: Elk bullets?
Other than muzzleloading elk, all my elk have fallen to nosler partitions.
The beauty is that you really don't have to choose. The NP has a soft nose to open up and a solid rear to punch through.
Most premium bullets today are fairly similar. The winchester failsafe is another example: the petals open up if no bone is hit, but it has a solid core behind it to push through in boney places.
Nosler was the first, but most of the newer premium bullets give you the best of both worlds.