need 338-378 with 300gr matchking data

Discussion in 'Reloading' started by lazylabs, Nov 14, 2006.

  1. lazylabs

    lazylabs Well-Known Member

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

    Thanks, Brad
     
  2. James H

    James H Well-Known Member

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    Jan 15, 2006

  3. Budman

    Budman Well-Known Member

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    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.
     
  4. lazylabs

    lazylabs Well-Known Member

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    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
     
  5. abinok

    abinok Writers Guild

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    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