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Warm up your Ballistics Calculator!

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  #1  
Unread 01-26-2010, 11:27 PM
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Warm up your Ballistics Calculator!

I was thinking it would be fun and interesting to see what some of the different programs would do out there so here's it is.

Sight-in data is a Berger 140gr bullet in .277 with a G7 BC of .248 and a G1 of 487 with a velocity of 3300fps. The scope is 2.2 in above bore and adjusts in 1/4 MOA zero's at 100yrds.

Environmental data is Baro at 29.96 in/hg, 27 degrees F with 81% humidity at a elevation of 5612.

Wind 5mph at 90degrees left to right, Azimuth is 334 degrees at 45 degrees Lat. Bullet is 1.245 long, right hand 1-11 twist.

I would like to get drops for 750, 1015, 1600, and 2200 yrds. Make sure to say what program your using and what you think. I can shoot at all the ranges but 2200 on the range. I will shoot them when I get something loaded up worthy of the longer ranges. Through some spin drift and Coriolis in also for fun.
This is for fun and something to think about. Lets have fun
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Last edited by bigngreen; 01-27-2010 at 09:46 AM.
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  •   #2  
    Unread 01-27-2010, 12:11 AM
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    Re: Warm up your Ballistics Calculator!

    Here is what I get using Exbal and the G1 BC if I entered all the data right.

    This is using a 100 yard zero.

    750 yards 12.25 MOA 2.00 MOA for wind

    1016 yards 20.50 MOA 2.75 MOA for wind

    1600 yards 49.00 MOA 5.50 MOA for wind

    2200 yards 103.00 MOA 8.75 MOA for wind

    Mudbug
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      #3  
    Unread 01-27-2010, 12:20 AM
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    Join Date: Feb 2008
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    Re: Warm up your Ballistics Calculator!

    Exbal with G1:

    750 yds: 12.0 MOA with 1.75 wind.
    1015 yds: 20.0 MOA with 2.75 wind.
    1600 yds: 47.5 MOA with 5.25 wind.
    2200 yds: 98.25 MOA with 8.5 wind.

    Still working on the others. Mind boggling, but what a great idea.
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      #4  
    Unread 01-27-2010, 12:31 AM
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    Re: Warm up your Ballistics Calculator!

    Ballistic FTE:

    750 yds: 12.26 MOA with 1.99 wind.
    1015 yds: 20.50 MOA with 2.92 wind.
    1600 yds: 50.17 MOA with 5.68 wind.
    2200 yds: 105.39 MOA with 8.99 wind.


    Just got this program yesterday and may need to tweak something??
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      #5  
    Unread 01-27-2010, 01:38 AM
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    Re: Warm up your Ballistics Calculator!

    Quote:
    Originally Posted by bigngreen View Post
    Through some spin drift and Coriolis in also for fun.
    Gonna need the bullet's overall length and a twist rate as well as direction of twist for accurate spin drift numbers. ;) Also, you say the wind is 5 MPH at 90 degrees. Which 90 degrees? Wind from 3:00 or from 9:00? This WILL make a difference with its relation to spin drift and the coriolus effect. At least for my personal calculators.
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    Last edited by Michael Eichele; 01-27-2010 at 01:41 AM.
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      #6  
    Unread 01-27-2010, 09:44 AM
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    Re: Warm up your Ballistics Calculator!

    Quote:
    Originally Posted by Michael Eichele View Post
    Gonna need the bullet's overall length and a twist rate as well as direction of twist for accurate spin drift numbers. ;) Also, you say the wind is 5 MPH at 90 degrees. Which 90 degrees? Wind from 3:00 or from 9:00? This WILL make a difference with its relation to spin drift and the coriolus effect. At least for my personal calculators.
    Sorry about that, I figured someone would find something they needed.

    Wind is 90 degrees from the left to right, 9:00. Bullet is 1.245 OAL and the twist rate is 1-11 to the right.
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      #7  
    Unread 01-27-2010, 11:07 AM
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    Join Date: Mar 2007
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    Re: Warm up your Ballistics Calculator!

    Using the G7 BC and MOBALL.
    Solution includes coriolis and spin drift.

    Code:
    Range  	Elevation	Windage
    	correction	correction
    ----------------------------------
    750 	UP 12.1 MOA	Left 2.4 MOA
    1015	UP 20.4 MOA	Left 3.6 MOA
    1600	UP 49.4 MOA	Left 7.2 MOA
    2200	UP 107.1 MOA	Left 12.3 MOA
    -Bryan
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