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Measuring Scope Height with a 20MOA Rail ??

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  #1  
Unread 10-04-2010, 03:55 AM
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Measuring Scope Height with a 20MOA Rail ??

Hi Guys,,,yes it's probably been asked before but i cant find a clear answer ?? Is it possible to do ?? where do we measure from ?? I have measured from firing pin to centre of the scope mounts.....as the rail is higher at the rear, is it better to measure at the objective ???

Cheers, Ray.....
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  •   #2  
    Unread 08-29-2013, 10:28 PM
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    Re: Measuring Scope Height with a 20MOA Rail ??

    Does anyone have an answer to this? I would also appreciate the help.
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      #3  
    Unread 09-03-2013, 03:57 PM
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    Re: Measuring Scope Height with a 20MOA Rail ??

    Ive always measured scope tube and bolt diameter, and distance form bolt to scope. Take half the tube half the bolt and add them numbers to distance between tube and bolt. Always work great for me out past a thousand.
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    Unread 09-03-2013, 05:05 PM
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    Re: Measuring Scope Height with a 20MOA Rail ??

    I measure center of the bolt to center of the tube at the center of the elevation knob. In my pea brain and limited knowledge of the modern rifle scope that is the place that makes the most sense to me.

    Someone with a more working knowledge of a rifle scope should chime in as to whether it makes a difference as to where in the elevation scheme your zero lies. I use a 10MOA base and where the scope is zeroed leaves about 45MOA up so it is zeroed off center. Does that make a difference?

    In my setup a 1/8 inch difference 1.75" verses 1.875" equals a .5 MOA difference in Exbal at 800 yards. Measuring at the center of the elevation turret very carefully has worked OK for me as far as I can tell and that adjustment is 1.875".

    On another note that is another adjustment one can make when proving a drop chart and trying to make all points of impact agree with the generated chart especially farther out even though I have not done that....food for thought.
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      #5  
    Unread 09-04-2013, 08:50 AM
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    Re: Measuring Scope Height with a 20MOA Rail ??

    Determining Scope Height Above Bore within AccurateShooter.com
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    Unread 09-04-2013, 10:10 AM
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    Re: Measuring Scope Height with a 20MOA Rail ??

    Quote:
    Originally Posted by kcebcj View Post
    I measure center of the bolt to center of the tube at the center of the elevation knob.
    This is what I do too and it makes sense to me. If there is a better way or reason to do it different I would like to know.

    Jeff
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      #7  
    Unread 09-04-2013, 08:04 PM
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    Re: Measuring Scope Height with a 20MOA Rail ??

    tell me if this is wrong, i measure the scope objective bell/ by 2, then measure the diameter of the barrel directly below that and / by 2 then add those two numbers to the distance between the bell and barrel rite?
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