Re: 30 cal questions .........
I think one of the biggest reasons the 280 isnt offered as a varmint rifle much is due to the long action it requires. One nice thing about the 308 is of course the short action and its ability to keep a barrel shooting very accurately after being fired many thousands of times where as many other cases burn out barrels much quicker.
I am very interested in tying the 280 AI. I also hear it is as accurate as the 308 and IF used with the right bullet, can have less drift. The draw back is less barrel life.
Long range shooting is a process that ends with a result. Once you start to focus on the result (how bad your last shot was, how big the group is going to be, what your buck will score, what your match score is, what place you are in...) then you loose the capacity to focus on the process.