More .257 Weatherby help needed.

Discussion in 'Reloading' started by 300winnie, May 15, 2006.

  1. 300winnie

    300winnie Well-Known Member

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    May 18, 2005
    Went to the range Saturday with high hopes of my loads consisting of IMR 7828 and Barnes 100 grain TSX's showing me good things out of my Mark V.

    Shot loads in half grain increments from 71 - 74 grains. Best group I got was with 74 grains, but it was over an inch. Extractor mark was starting to show as well...so I have two more suitable powders on hand to try. Which one would you try first with the above bullet?
     
  2. POP

    POP Well-Known Member

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  3. BLASERMAN

    BLASERMAN Well-Known Member

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    Apr 9, 2005
    I shoot 4064 out of mine with grate results.120 NP's
     
  4. Hired Gun

    Hired Gun Well-Known Member

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    Which primers and what is your OAL? On this load in the 257wby I have had god luck with CCI-250 primers. What was your top velocity when you backed off?
     
  5. OKbow87

    OKbow87 Well-Known Member

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    Feb 22, 2006
    I'm shooting 73.5 grains of RL22 with federal 215m primers, bought weatherby brass, 100 tsx, with an oal of 3.425", all going into a 1/2 inch hole. My gun is a mkv ultralightweight with 26" barrel.