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Shooter Program Question

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  #8  
Unread 01-30-2013, 03:39 PM
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Join Date: Jan 2013
Location: Meridian, Idaho
Posts: 1,550
Re: Shooter Program Question

I input 8.00. I think I see your point. MV in that calculation is FPS per Degree of temp change. I was thinking it was FPS spread. No wonder it was such a mess.

What do you use for a number?
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  •   #9  
    Unread 01-30-2013, 04:31 PM
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    Join Date: Feb 2007
    Location: Townsend, Montana.
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    Re: Shooter Program Question

    Quote:
    Originally Posted by BrentM View Post
    I input 8.00. I think I see your point. MV in that calculation is FPS per Degree of temp change. I was thinking it was FPS spread. No wonder it was such a mess.

    What do you use for a number?
    I am not using it yet as I am still gathering data to average. But lets say you have a drop of 20 fps when the ambient temp drops 40 degrees. That is a drop of 1/2 fps per degree. So the MV Variation would be .5 and the powder temp would be the day of zero sight in, and muzzle velocity of that day at that temp. Like I said I am not using it yet, but that is the way I understand it. Someone correct me if I am wrong here.

    Jeff
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      #10  
    Unread 01-30-2013, 04:39 PM
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    Join Date: Jan 2013
    Location: Meridian, Idaho
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    Re: Shooter Program Question

    I agree now that I understand what you were saying. I have to DOPE this rifle anyway and will see what I can gather for info as well. For a month we had temps in the 0 to 10 range and now the temps are 20-40.
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