I just received orders to go to Fairbanks, AK for 3 yrs. I am really excited about the hunting and fishing opp. My question is, I have hunted whitetails with my .270 my whole life but this will be the first time hunting big game. (moose, blackbear, caribou, and hopefully Kodiak Brown bear.) What is the BEST knock down gun out there. My friends are telling me a 300. I would really appreciate some feedback from you guys that hunt these animals. Thanks.