I've taken one of my 7 elk with the 180 gr NPT....no fuss, no muss. I also took a mountain caribou in Canada's NWT with the same recipe. I've also used the 150 and 165 gr Partitions as well, but on other animals, not elk. They pretty much all work with boring efficiency.
After 65+ years, the Partition is still the gold standard in premium bullets. "They always expand and they always penetrate." Bob Hagel. Can you ask for more?
"For every complex problem there is an answer that is clear, simple.....and wrong." H. L. Mencken