First of all just want to says thanks for all the replies I got on my last post. This is what I am planning for my build. after a huge amount of deliberation I have decided on a 7mm Rem Mag. I have looked at the top BC of bullets sold by berger and sierra. The highest bullets are 7mm as compared to a .30 cal that's 210 grains. For this gun I am going to do long range shooting with it and also would like to hunt with it given the chance. So, my question is...have I made the right choice or should I just go with a .30cal like a .308 like everyone else or something else...thanks !!