i've hunted sheep several times and feral goats in hawaii. my favorite rifle is my 243, but 30.06 isn't a bad choice either. you don't need some 300 super long action double-whammy ultra-huge hunting magnum caliber. shoot your favorite deer rifle because sheep aren't that thick skinned. most guys don't practice enough before hand, so practice hard.

i'll be after bighorns this year myself. my fitness goals are coming along, but the hardest thing for me is the elevation change. unfortunately though, i'm putting on more muscle than i want. which is a problem for me because it takes more oxygen and more food to keep me going if i get all Arnold Schwarzenegger'd out. i struggle with this the most because i don't need to be up in the mountains carrying 20 pounds of food and water.

just a tip, get your pack together and all your gear now. put it ALL away and stop thinking about it. worry more about engaging your quarry than what piece of gear you'll be holding when your chance comes. i've killed more animals with just my weapon, a knife and a tag on my person than anything else. but i'm a minimalist... to me though, i think that's what sheep hunting is about. the basics.