What specs do I need to look for in a spotting scope that will be used for shooting out to a 1000 yds? Any recommendations that you have for a particular model are welcomed. I keep reading good things about the new Bushnell with the mil-dot reticle. I am looking for the best bang for the buck. And probably most importantly, how necessary is it to have a spotting scope when shooting to a 1000 yds. I have never used on in shooting out to 300, but notice that many others seem to.