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Horizantal spread

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  #1  
Unread 09-12-2011, 09:05 AM
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Horizantal spread

what are the causes of hotizantal spread in a group?
I am currently getting an inch and a half, three shot group at 200 yard
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  •   #2  
    Unread 09-12-2011, 09:25 AM
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    Re: Horizantal spread

    Sounds like a wind issue, but would need a bit more information to say for sure. How many groups fired, and was this consistent in all of them?
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    Kevin Thomas
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      #3  
    Unread 09-12-2011, 09:32 AM
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    Re: Horizantal spread

    Two identical groups, wind should not have been a factor, like two miles an hour or less. Using 168 berger 7mm @ 3025 fps.
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    Unread 09-12-2011, 09:38 AM
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    Re: Horizantal spread

    How are you gaging the wind?
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      #5  
    Unread 09-12-2011, 09:41 AM
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    Re: Horizantal spread

    The batteries on my meter were dead so it was an educared guess from experience
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      #6  
    Unread 09-12-2011, 10:33 AM
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    Re: Horizantal spread

    Very few anemometers will read down to 1-2 mph reliably, but it must have been absolute calm, I'm assuming. Usually you can't even feel much of anything at these speeds. With this calm of condition, and only six shots fired, I'd say you need to do some more shooting before calling this a legitimate "horizontal spread" rather than just a fluke. Most shooters don't expend anywhere near enough ammo for their groups to be statisically valid, so it really is just an educated guess. Load up some more of the same and repeat the strings at least five times. The horizontal componenet may or may not show up with the increased groups, and that should tell you a bit more.
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      #7  
    Unread 09-12-2011, 10:36 AM
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    Re: Horizantal spread

    Yeah I ran out of day light. I'll shoot some more and see. Thanks
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