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what is a come up chart

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Unread 03-10-2008, 01:05 AM
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Join Date: Mar 2008
Posts: 2
what is a come up chart

sorry to ask but..... What is a come up chart and how do you use it.... thanks in advance...
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    Unread 03-10-2008, 07:15 AM
    Silver Member
    Join Date: Jan 2008
    Location: Everett, WA
    Posts: 421
    It gives you information on how much scope adjustment needed for different distances. "Come ups" are usually in MOA so if you see a nice buck, range it at 490yds, you look at your come up chart for 500yds, turn your turret to the desired MOA and drop him. I have mine taped to my stock for easy refrence.

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    Unread 03-10-2008, 06:41 PM
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    Join Date: Aug 2007
    Location: bismarck ND
    Posts: 406
    dont forget to include wind drift at those extened ranges. up down easy left right the hard part. i also put the temp and elevation so i dont have to remember.
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    Unread 03-10-2008, 07:32 PM
    Platinum Member
    Join Date: Jun 2001
    Location: Potomac River
    Posts: 5,071
    To establish your "come up" chart you can use a ballistics calculator such as

    JBM - Calculations - Trajectory

    This will give you a first approximation of your trajectory. You take that chart to your long distance range and shoot your rifle with your load and make corrections to the "predicted" values by replacing them with the real values.

    When you are done shooting you go back to JBM and rework your data. Typically the BC will not be as large of a number as the factory said. So with a little fiddling of numbers and tweaking, you will then have the factors that fit your rifle and your load for the temperature and conditions that you fired the data for. You can then use that to make drop charts for other temperatures and elevations.
    The Smokin Fur Rifle Club
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