I've put a few elk in the freezer with the basic Remington 165 gr CoreLokt. I use the same bullet in my 30-06 and my son's 308. The only reason I would change is the current availability problem - fortunately, we're fairly well stocked.
I don't recall an elk making it much over ~60 yards after being hit.

I've always been a curmudgeon - now I'm an old curmudgeon.
~Molɔ̀ːn Labé Skýla~