I am new to the site and I'm amazed with some of the knowledge people here posses. So I was thinking to myself where better a place to ask for advice. I am looking for a new hunting rifle to take large game at longer range,I live in Montana). I was looking at the Rem 700 in several configurations and then I started thinking about caliber. What are some opinions on the best caliber for hunting large game such as elk at short or extended range? I have narrowed it down to 7mm or 300 win mag. Also what are some opinions on the 7mm rem mag vs 7mm rem ultra mag. Thank you help me make this decision, any info would be appreciated.