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Awesome Groups but fliers?

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  #1  
Unread 09-10-2009, 06:11 PM
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Location: Missoula, MT USA
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Awesome Groups but fliers?

I am getting .5MOA with my .300 RUM. 200 gr. Accubond, 88 gr. H1000, But... In almost every five shot group I have shot, I am getting a flier, some as far away as 2" from the others at 100 yds. Sometimes I just want to quit while I'm ahead and shoot a three shot group when I know they are all in one ragged hole. What do I do? I am getting larger groups with more charge, but no fliers.

Sometimes, the second shot is the flier, sometimes the fifth shot is the flier so I don't know that it's related to heat.

What would you do?

Overall reloading has been fun and very rewarding and I am still learning, I just want to fine tune a little bit and I don't know what to do.

Thanks.
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  •   #2  
    Unread 09-10-2009, 06:37 PM
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    Re: Awesome Groups but fliers?

    Trout,

    Try playing with your seating depth, sometimes .005 or .010 one way or the other can do the trick.

    Chris
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      #3  
    Unread 09-10-2009, 06:49 PM
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    Re: Awesome Groups but fliers?

    Is it always the 4th or 5th shot? If it is, maybe cooling is an issue. Are your velocities uniform?
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      #4  
    Unread 09-10-2009, 08:53 PM
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    Re: Awesome Groups but fliers?

    could be you barrel is to hot, or it needs to be clean, or as simple as you heart beat, or try different powder...
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      #5  
    Unread 09-10-2009, 11:39 PM
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    Join Date: Sep 2009
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    Re: Awesome Groups but fliers?

    Here are some things to check.
    • Are you trimming your cases. Case length differences can have an effect
    • Are you de-burring your flash holes. Improper ignition caused by a primer hole burr could also have an effect.
    • How are you weighing your powder? Are you certain of accurate weights.
    • Do you put a crimp on your finished loads. A 'factor' crimp is usually a good idea and can create more consistent pressures.
    That's all I can think of. Hope that helps.
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      #6  
    Unread 09-11-2009, 05:32 AM
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    Re: Awesome Groups but fliers?

    What twist rate does you riffle have? Did it ever shot nice groups before (no fliers)?
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      #7  
    Unread 09-11-2009, 08:10 AM
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    Join Date: Jan 2007
    Location: Granbury, Texas
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    Re: Awesome Groups but fliers?

    When you get a flier mark that brass. After a while you should have enough brass that is grouping. Then shoot your group with good and see if you are still getting a flier. Case capacity may rearing it's head?
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