most deer I have shot have been under a hundred yards, so you know I am not so much worried about 600 yards as I am about terminal performance at 50 yards, I bet there are not many 600 yard shooters here.
I'm happy for you... I'm not shooting deer with mine, I use my AR15, for NRA mid range prone shoots.. far as the last part of your comment, you will be surprised who's shooting out to 500,600,700 yds with their AR's..