I’m of the old school. 300 win mag loaded with 200gr Aframes or Partitions. Take anything you shoot at.
If you get there and the 80 rounds of ammo that you custom loaded and tested and brought with you disappear, you borrow/rent a rifle from the outfitter... shit happens, you don't have to dumb down your approach to cover a "what if" scenario. This isn't a life or death scenario... most gun nutters want to hunt with their own rifle, but we also want to hunt with our own ammo that we spent hours and $$$ developing and testing. If that can't happen you make do. I have traveled to hunt a heck of alot over the past half century and have never lost ammo, I'm not going to start sweating it now. Build and shoot what you like.See post 58. Newer calibers all run this risk.