My wife just bought me a Nikon 308 scope. The elevation turret says its match for a 168gr bullet. My question is how accurate is this dial once it is set. I mean if i turned it to 300 would it put in on a 300yrd target. I have not used it yet, was just wondering before i took it to the rang next frieday. Its going in my Savage 10BA Stealth 308 I just picked up.