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what is a come up chart

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Unread 03-10-2008, 01:05 AM
Junior Member
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
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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
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Join Date: Jun 2001
Location: Potomac River
Posts: 5,084
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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