Standard Base vs elevated base?

Discussion in 'Gunsmithing' started by kc, Oct 18, 2010.

  1. kc

    kc Well-Known Member

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    I have in my hands two diferent Bases made by Leupold, one is a standard Base and
    another that is elevated 20 moa...Can I use the elevated Base for 100 yard shots?
    or should I stay with the standard Base?

    thank you.
     
  2. ewallace

    ewallace Well-Known Member

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    I use a tapered base to shoot all the ranges I shoot. You just wont be in the optical center of your scope so it is a compromise.
     

  3. J E Custom

    J E Custom Well-Known Member

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    If the range of fire is 600 to 800 Max then I would stay with the standard base.

    If the range will most often be over 800 yards then use the 20MOA base. (Depending on
    which scope you have, the 20 MOA may not zero at 100 yards).

    For most hunting rifles I like the 10 MOA bases because they will work at all distances
    out to 1200 Yards.

    J E CUSTOM
     
  4. kc

    kc Well-Known Member

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    Thank you.
     
  5. mike33

    mike33 Well-Known Member

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    I started to replace all of my bases with 20 moa and have a 40 moa on my edge. is there anything wrong with that? 1 rifle i use for around my home i might be shooting 75 yards any problem.
    mike
     
  6. J E Custom

    J E Custom Well-Known Member

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    Nothing wrong if you are shooting 1500 + yards only.

    The problem with big MOA bases is that you can't zero at normal hunting distances.

    Most top end scopes have a 80 or 90 MOA total range so if you use a standard base you
    will be somewhere in the middle of the turret range and if you want to shoot 1000 yards
    40 MOA=approximately 400 inches at 1000 of come up.

    If you place a 40 MOA base on a rifle to start with your scope will have to be at the bottom
    of the turret travel and end up approximately 40" high @ 100 yards.

    For most hunting rifles 0 to 10 MOA bases work best and keep the scope in a good operating range.

    So if you place a 20 MOA base on a rifle with a scope that has 95 MOA built in that will give
    you 65 MOA total up from a 100 yard zero for the scope(20+45) .

    65 MOA at a thousand yards is 650 Inches of come up.Most rifles only need 300 to 400 inches
    of elevating to hit.

    What I recomend for base MOA is to look at the drop from 100 Yards to max to be shot based
    on bullet performance and skill, and find a base that keeps the scope in the middle of its range
    without bottoming or topping the turrets out.

    I hope I have explained the need to pick the right base for best performance. this is a place
    that bigger is not necessarily better.

    PS; If my math is off feel free to correct me . (I have not had my coffie yet).

    J E CUSTOM
     
  7. mike33

    mike33 Well-Known Member

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    thanks for a well detailed responce.
    mike