OK. After many years I was able to buy my first dial scope, Nightforce ATACR 5-25 w/ a MOAR recticle. Prior to this time I have just used regular non dial up scopes. So, I need some help. 1.) Can I sight in this scope at any power setting and it will shoot dead on at all power settings? 2.) Since it is a dial up, do I just shoot at various yards and count how many clicks up from zero I need to be dead on at the various distances then write them down? 3.) Is it easy to shoot different bullets since I would have dial up info. Could I have a bullet for deer and another for varmints, take both hunting, and depending if a deer appeared or a coyote, I could pick the bullet, range find the distance, and dial up. 4.) With the MOAR recticle, do guys sometimes just sight in a gun at 200 yards then use the 1 moa elevation hash marks for longer shots without dialing? 5.) Suggestions, cautions, tips, etc. all appreciated.