Recently purchased a Remington 700 SPS Stainless .300 RUM with 26" barrel. Changed the stock already to a laminate thumbhole. I have never tried to shoot more then 200 yards so I am very new to long range shooting. I shoot a really good group at 100-200 and really would like to learn to shoot to about 500-600 and maybe even further if possible. I will be hunting deer with this gun. I know it takes a lot of practice but I was wondering what would be the best optics, rings for this gun? I am interested in the scopes with turrets because it seems to take the guess work out. Not big on the mildot scopes I usually like my crosshairs fine. I would like to spend around $1000 or less for the scope but will consider spending a little more if its worth it. This is a hunting rifle so I would like something that is very good in low light as well. Thanks for your opinions in advance!