Looks like some good suggestions to your interest in long range shooting. Another site that deals with this subject is Longrangeshooting.com Even if not interested in the hunting aspect, there's a wealth of information regarding the subject, rifles, calibers, reloading, optics and this site has numorious highly qualified gunsmiths that deal with long range shooting.
I might also sugest searching for books, magazines, etc. that are deciated to this challeging but extremely fun sport.
I got hooked some 25 years ago and am still learning ways to become a more accomplished long range shooter.