downs

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    Rifle Scopes Mark4 Factory Zero = more ups than downs?

    Still reading and much as I can about acquiring a new sight. I read about Mark 4's and if I understand this correct; 70moa adjustment is not 35 each way but in fact internal adjustments are 50moa up and 20moa down. Correct? Is this common with other scopes or just a Leupy thing, or am I off track?