Ok, so I'll start off with a little background. I'm currently a college student in Michigan and I'll be graduating and moving to Colorado in May. I have a job lined up in central Colorado around game management units 49, 500, 501, 37 and 50. I have spent a couple summers out there and know the area fairly well. I know I'll have the opportunity to hunt at elevations from 8-12 thousand feet. Shots will be anywhere in the range of 5- My personal limit of 600yds. Now my questions: I will be building a rifle this summer for my future endeavors. Which caliber? Action? Barrel? Stock? Optics? What overall weight do you think I should shoot for? Very open to opinions and tips based on experience. Thanks for the input.