Need 300 WSM Load data.

Discussion in 'Reloading' started by WyoHunter1, Apr 21, 2019.


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  1. WyoHunter1

    WyoHunter1 Well-Known Member

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    I'm going to start loading for a new 300 WSM. I have Norma brass Hammer 181 grain bullets. Federal edge TLR 175 Gr bullets, Federal 210,215 and Win WLRM primers. I have RL 26, H4350,7828SSC and a few other powders on hand. The rifle is a 1-10 twist in a 24" barrel.
    The chamber will accept a 3.070" COAL but the magazine will only accept a 2.930" COAL.

    With the bullets and primers I have on hand do you guys have any suggestions to start load development. I am open to ideas. If possible I would like to develop a load at least 3000fps if it is possible and keep good accuracy.
    Thanks in advance.
     
  2. WyoHunter1

    WyoHunter1 Well-Known Member

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    Somebody has to have experience with these components or similar in a 300WSM.
     
  3. Wedgy

    Wedgy Well-Known Member

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  4. WyoHunter1

    WyoHunter1 Well-Known Member

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  5. Wedgy

    Wedgy Well-Known Member

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    Reloder 26 has shown to spike pressures at temps above ~85F so keep that in mind.
    Alliant has data for the 300 WM with Reloder 26 that can give you an idea, case capacity is 8 or 10 grains difference so keep that in mind. The Hammer Hunters generally build less pressure than others of the same weight.
     
  6. Wedgy

    Wedgy Well-Known Member

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    Last edited: Apr 22, 2019
  7. warpig602

    warpig602 Well-Known Member

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    Have you found that your Norma brass has a smaller case capacity than other 300WSM brass?
     
  8. WyoHunter1

    WyoHunter1 Well-Known Member

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    I have never measured the capacity, I know when I load my 300WBY brass made by Norma it holds more than Remington brass.
     
  9. warpig602

    warpig602 Well-Known Member

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    Odd, my Norma 300wsm brass is 2-4gr less than others are reporting from there Win.
     
  10. WyoHunter1

    WyoHunter1 Well-Known Member

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    I haven't measured the capacity in the 300WSM. I just compared the 300 Weatherby using Weatherby/norma brass and Remington brass. With a 180 grain TTSX and 84 grains of 7828 the weatherby brass still had more room for powder and the Remington brass was a compressed load.
     
  11. warpig602

    warpig602 Well-Known Member

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    Yeah, I only checked the capacity on the 300wsm after starting with a middle of the road load and was already crunching powder. Seating a bit longer thank book too.
     
  12. Jack7mm08

    Jack7mm08 Member

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    I shoot 168gr Sierra MK and NOS Accubonds in mine. 67.0gr of Hodgdon Superformance and CCI magnum primers. I get 1/2moa consistency w/around 3070fps
     
  13. LoneTraveler

    LoneTraveler Well-Known Member

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    I bought a Kimber 300 WSM in 2004. Had to get load information off the internet, Not in reloading books at that time. The load I settled on was.
    Case: New Win. with all the grunt work done.
    Primer: Old Win. LR. for standard or magnum loads.
    Powder: IMR 4350 Load 65.0 Gr. (Sixty Five. 0)
    Bullet: 180 Sierra, 180 Hornady, 180 Nosler Partition.
    OACL 2.860" Shoots all 3 bullets under .75 at 100 yds.
    Elk, Caribou. and deer with these loads.

    Tried 150 Gr. 165 Gr. Jacket/Core bullets and 165 Gr. Hornady GMX and 168 Gr. Nosler E-Tip, This Rifle shot non of these bullets accurately.
     
  14. jjmp

    jjmp Well-Known Member

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    Cross reference all the reloading material you can ,the answers are out there take some time and fine them . Make notes or take pictures ,different sources use (different) Brass , now there you go ,!!! Lots n lots of info is already printed and free , do your Homework it's not that hard ,Reading is learning and it'll keep you safe !!!