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What ballistic program to use

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  #1  
Unread 09-06-2013, 01:16 AM
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Join Date: May 2010
Posts: 12
What ballistic program to use

Been comparing the dope from the following three different programs
Strelok Pro (phone app)
Sierra Infinity
LRH online calculator
The LRH calc is real close to the Strelok Pro while the Sierra Program shows 25" less drops at 1000 yards. All three programs are really close out to 700 yards, then the Sierra program begins to really deviate from the other two. What to do ?
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  •   #2  
    Unread 09-06-2013, 09:50 PM
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    Join Date: Feb 2012
    Location: Remington County, PA
    Posts: 385
    Re: What ballistic program to use

    Maybe check them against some of the "online" ballistics calculators?
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      #3  
    Unread 09-06-2013, 10:23 PM
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    Join Date: Nov 2010
    Location: Ashflat, AR
    Posts: 397
    Re: What ballistic program to use

    maybe some of your data isn't the same on the one program?

    have you shot actual drop data?
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    Weatherby Vanguard 7mmx300win (28 nosler reaming coming)
    Weatherby Vanguard 270x300win in the works
    Savage LRH 6.5x284
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      #4  
    Unread 09-06-2013, 11:16 PM
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    Join Date: May 2010
    Posts: 12
    Re: What ballistic program to use

    Yes I have got my own data out to 750. Been shooting the same rig since 2010, but with a 500 yard zero. I toned down my load and want to go with a 400 yard zero, so began playing with my programs for the first time in a while. I double checked the inputs but will do so again. Do you have any quick tips for measuring the scope height from center of bore ? I have never done it (foolishly) and is my only unknown.
    Thanks
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      #5  
    Unread 09-06-2013, 11:35 PM
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    Join Date: May 2011
    Location: Ventura CA
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    Quote:
    Originally Posted by rimrockhunter View Post
    ...Do you have any quick tips for measuring the scope height from center of bore ? I have never done it (foolishly) and is my only unknown.
    Thanks
    Use a ruler.

    Small errors in this parameter don't have a big effect on the drop. I usually just eyeball it from the side.
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      #6  
    Unread 09-06-2013, 11:36 PM
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    Join Date: Nov 2010
    Location: Ashflat, AR
    Posts: 397
    Re: What ballistic program to use

    no tricks there but running the difference in 1.5 and 1.75 i'm only seeing 1 click difference at 1000 so as long as you have something put in the program in that range I doubt that is your issue.

    does your actual drop match up with any of the programs?
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    Weatherby Vanguard 7mmx300win (28 nosler reaming coming)
    Weatherby Vanguard 270x300win in the works
    Savage LRH 6.5x284
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      #7  
    Unread 09-07-2013, 05:48 AM
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    Join Date: Jan 2008
    Location: Northeast
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    Re: What ballistic program to use

    I have found that the Nightforce, Shooter(iPhone), Ballistic FTE(IPhone), and BOTW all produce identical drop data with the same inputs. They all match the output of my G7 BR2 Rangefinder. They all seem to use the same algorithm. The drop data matches the actual shooting results out to 1000+ with two different rifles. I'm partial to Shooter , and use itin the field when I'm not using my G7 BR2.
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