257 weatherby load

Discussion in 'Reloading' started by gapfriz, Sep 5, 2012.

  1. gapfriz

    gapfriz Well-Known Member

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    I just picked up a 257 weatherby in a trade, it came with alot of brass. Whats a good bullet and powder combo for hunting deer and antelope sized game?

    Thanks guys
    David F,
     
  2. Physhstyx

    Physhstyx Active Member

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    Bump As I am interested n this as well.
     

  3. cummin_un_glued

    cummin_un_glued Well-Known Member

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    I run 73gr of h1000 or 71gr of RL25 in mine with 110gr accubonds
     
  4. HogginKing

    HogginKing Active Member

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    I use IMR 4350 and Nosler 100 gr. BT. CCI mag primers...

    Hogginking
     
  5. MudRunner2005

    MudRunner2005 Well-Known Member

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    70gr of H1000 with the Berger 115's or 110 NAB's.

    But I'm still not done with load development quite yet, but these loads are shooting 3/4 MOA. Still need a little tweaking to try to get 1/4-1/2 MOA.
     
  6. AZShooter

    AZShooter Well-Known Member

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    The following loads must be worked up to....your rifle may not respond the same. Have fired the norma 257 Weatherby brass four times with no primer pocket looseness or other signs of excessive pressure.

    Barrel has over 800 rounds through it. It is now so worn that 115 VLDs are occasionally being damaged.


    Switched to the 110 moly coated accubond which has no issues with integrity:

    257 Weatherby: 28" #5 fluted SS Lilja 3 groove barrel, moly coated 110 accubond, .015" off rifling. (custom shorter throated chamber reamer)

    75.5 gr of RL-25 vel 3615 fps

    Then RL-33 came out:

    moly 110 accubond:


    unknown territory, started low with 76 gr for vel of 3318
    jumped to 80 gr 3432 fps
    81 gr 3525
    82 gr 3559
    83 3625 slightly faster than old load with RL-25
    83.5 3674 fps shot well two shots were same velocity
    84 gr 3704 fps shot well two shots were same velocity
    84.5 gr 3735 this is max case capacity with 6" drop tube

    Have shot the 84.5 gr load multiple times including temps in the low 90s with no pressure signs. Excellent accuracy tested out to 500M.
     
  7. lloydsmale

    lloydsmale Well-Known Member

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    my cdl likes 76 grains of re25 and a sierra 100 grain pro hunter with a fed match mag primer. It shoots ballitic tip 100s near as well with the same load. Its killed like the hammer of thor on long range whitetail.
     
  8. marioq

    marioq Well-Known Member

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    What kind of OAL you getting???
    Just measured mine and it was 3.343 inches to tip of bullet. That was to lands by feel.
    Just curious as I've never loaded for this one.
     
  9. firstcoueswas80

    firstcoueswas80 Well-Known Member

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    My .257 wby likes a jumpe, with 3.230 being the OAL for the Accubonds, and (I believe off the top of my head) 3.295 with the 100 TTSX.


    I have killed anything with the Accubond yet, but that is what I will be using this year. I have killed or seen killed a couple dozen animals with the 100 TTSX and it has been amazing.

    I shoot 73 Gr. R25 with the 100 TTSX and
    68 Gr. R22 with the 110 Accubond.
     
  10. marioq

    marioq Well-Known Member

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    Ok cool. At least I'm not out the ballpark just seemed so long compared to the hornady stock ammo I bought.
     
  11. Freebore

    Freebore Well-Known Member

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    H-1000 w / 115 Bal-tip deadly.
     
  12. marioq

    marioq Well-Known Member

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    What are the specifics??
     
  13. MudRunner2005

    MudRunner2005 Well-Known Member

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    70gr of H1000, Fed 215 primer, with a Berger 115 VLD or a 110 NAB seated to about 0.005" short of magazine length. Weatherby has lots of freebore anyway, so seating depth will only help to adjust how much or how little case pressure you create. Neck tension also helps determine how much or how little pressure you create.
     
  14. snox801

    snox801 Well-Known Member

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    Muddrunner what velocity are you get and what accuracy. I just got mine 257 back from Bob Hart. And working up loads now with 115 bt and h1000. Hopefully I can get this thing cloverleafing.