nikon m-308 bdc 800

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    Rifle Scopes Nikon M-308 BDC 800

    I just purchased this scope for my Bushmaster AR .308. Can someone explain in detail how to utilize the turrets. I understand how to sight it in utilizing windage and elevation, but I don't understand the turret on top of the scope, or the "zeroing" feature, or how to use it. I was amazed that...