Re: Idaho Trophy Hunts
Congrats on drawing your goat tag! I hunted Mtn goat in northern BC 3 years ago. Many would say I was over-gunned, but I always say you can't kill them too dead. I Killed a nice 9 7/8" billy at 358yds with my .416wby.
From my one time experience, I would reccomend the .300 ultra. I was very surprised at how big these animals are, and how much punnishment they can take. I shot mine through the boiler room with a 350grn Swift A frame. He still ran 150 yards accross a cliff face before taking a nose dive.
Also be prepared for very steep angle shots which as I am sure you know can really screw you up especially at longer ranges.
Good luck! Post pictures when you get back!