338RUM Accuracy Load?

Discussion in 'Reloading' started by idaholonggunner, Nov 20, 2007.

  1. idaholonggunner

    idaholonggunner Member

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    I'm having a 338 Ultra Mag built and would like some assistance with a good 300gr Matchking load. Rifle will be used @ extreme long range, so accuracy is paramount.

    Also, has anybody found a source for reasonable Rem brass for this round?

    Thanks in advance.
     
  2. royinidaho

    royinidaho Writers Guild

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    Best load for my 338 RUM and 300 SMK is US 869 and Fed 215 GMs. ESs in single digits. 2700+ fps out of a 26" sporter barrel.
     

  3. idaholonggunner

    idaholonggunner Member

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    Thanks Roy!
     
  4. Bigcat_hunter

    Bigcat_hunter Well-Known Member

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    I use 92 grains of H1000 and Federal match magnum primers with the 300 smk. I get 2770 out of a 26" barrel.
     
  5. Chawlston

    Chawlston Guest

    What sort of velocity spread are you getting? Thanks in advance.

    Chawlston
     
  6. Bigcat_hunter

    Bigcat_hunter Well-Known Member

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    What do you mean by velocity spread? I can get it to shoot faster but it starts showing pressure signs with any more powder than 92 grains.
     
  7. Chawlston

    Chawlston Guest


    The velocity spread I am talking about is from shot to shot. How consistent is the velocity in say a five shot string? Thanks.

    Chawslton
     
  8. Bigcat_hunter

    Bigcat_hunter Well-Known Member

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    Its very consistent. If I remember right there is no more than 5 to 10 fps change with a 3 shot string.
     
  9. davewilson

    davewilson Well-Known Member

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    try the CCI mag primers. they work very well with this combo.