I am looking at buying my first totally custom rifle. I have been shooting since about age 4 and also have experience with competitive precision shooting. Now that graduation is nearing, I have pretty large sum of money that I am setting aside to build a nice, solid, durable, custom rifle that is pretty mush a "do all." I am stuck between a .260 remington, .308 win, and .300 win mag. I would like a heavier barrel and the whole rifle will be on a chassis system. I plan on shooting out to ranges around 800-1000 yards max. Also, I will hunt with it at some point. I have reloading equipment, but I still want something that's semi common in case I get in a bind. I'm looking at a Tikka action and a Remington 700 action.