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need 338-378 with 300gr matchking data

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  #1  
Unread 11-14-2006, 06:36 PM
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Join Date: Oct 2006
Posts: 864
need 338-378 with 300gr matchking data

I need starting data for 300gr matchkings in a 338-378, please specify factory or custom chamber.

Thanks, Brad
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  •   #2  
    Unread 11-16-2006, 07:55 PM
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    Join Date: Jan 2006
    Location: Nebraska
    Posts: 507
    Re: need 338-378 with 300gr matchking data

    http://www.hodgdon.com/data/rifle/3878wea.php
    Bottom of page


    Sierra starting loads for 300gr SMK
    IMR 7828 87.0gr
    H-1000 90.5gr
    RE-25 90.0
    H870 98.5
    AA8700 98.5

    S.A.M.I chambers
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      #3  
    Unread 11-17-2006, 07:24 AM
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    Join Date: Dec 2003
    Location: Wi
    Posts: 91
    Re: need 338-378 with 300gr matchking data

    Mine has a minimum sammi chamber and I can reach the lands at 3.90 col, RE-25 shot ok but could not get the speed I was looking for. US869 at 115 grains runs 3000 from a 34 inch barrel and no pressure signs. I did try WC872 and was at 115 grains also but speed was less then the US869 and I needed a summer and winter load with the difference being 2 grains.
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      #4  
    Unread 11-18-2006, 07:27 AM
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    Join Date: Oct 2006
    Posts: 864
    Re: need 338-378 with 300gr matchking data

    Thanks I have RL 25 and 7828 so I loaded 10 of each and will give them a try. I am glad they started selling the 300's in smaller batches so you can try them for less than $100. Thanks
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      #5  
    Unread 11-19-2006, 12:08 PM
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    Join Date: Nov 2004
    Posts: 877
    Re: need 338-378 with 300gr matchking data

    AA-8700 98.5 grains - 110.0 grains
    H-870 98.5 grains - 109.0 grains
    H-1000 90.5 grains - 98.0 grains
    H-4831 84.0 grains - 90.0 grains
    IMR-7828 87.0 grains - 93.0 grains
    Retumbo 100.0 grains - 106.5 grains
    RL-25 90.0 grains - 99.0 grains
    US-869 108.0 grains - 115.0 grains
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