375H&H load data - 300gr Sierra Gameking

Discussion in 'Reloading' started by Alistair, Sep 25, 2019.

  1. Alistair

    Alistair AH Veteran

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    Hi all,

    I'm looking for some load data for a 300gr Gameking out of a 375H&H.

    I don't suppose anyone has a copy of the Sierra manual and would be willing to post a pic of the page for this cartridge?

    Recommendations on powder etc are also most welcome, although I'm likely going to try N160 and RL15 first off, as I have both from other calibres.

    This'll be a load for plinking at the range and hopefully some driven boar in the not too distant if it makes any difference.

    Thanks,
    Al
     

  2. Hearties

    Hearties AH Veteran

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    Hi - from the Sierra app...
    IMG_0430.JPG
     
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  3. Jeffrey

    Jeffrey AH Veteran

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  4. Alistair

    Alistair AH Veteran

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    @Hearties , many thanks that's perfect.

    Jeffrey, yeah, I agree the Gameking is no good for anything too substantial, but they are good value, give good velocity and are impressively accurate in everything I've used them in (.270 primarily).

    Besides, the paper boar on the range won't mind, and I can always keep them for practice if they aren't up to snuff.
     

  5. Hearties

    Hearties AH Veteran

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    You’re most welcome - I’m sure they’ll work just fine on everything up to buff.
     

  6. PHOENIX PHIL

    PHOENIX PHIL AH ENABLER AH Ambassador

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    I've not used the Sierra or developed a load for it. But my rifle along with many others I've read about in .375H&H like IMR4350. I've developed three loads with 300gr bullets using this powder.
     
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  7. Wyatt Smith

    Wyatt Smith AH Enthusiast

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    Hodgons website has load data for the 300 Sierra with Winchester Hodgon and IMR powders.
     

  8. meigsbucks

    meigsbucks AH Fanatic

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    This is from the fifth edition.
    Hope this helps.

    image.jpg
     
    Last edited by a moderator: Sep 25, 2019
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  9. bruce moulds

    bruce moulds AH Elite

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    I have used this bullet a bit.
    on donkeys it is a good killer and has reliable terminal performance, having a wide mushroom, and retaining a lot of weight.
    also very accurate,
    can't remember my load, but it was between 75 and 77 gns h4350, and was doing around 2550.
    I would not shoot a big bovine on the point of the shoulder at close range with this bullet.
    bruce.
     
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  10. Wyatt Smith

    Wyatt Smith AH Enthusiast

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    I loaded some with h414 one grain above minimum per hodgons website, I can’t remember the charge now. It produced 1 inch groups at 2525fps out of my M70 safari express.
     

  11. dchamp

    dchamp AH Veteran

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    Whinchester M70 Safari
    24" barrel
    300gn SGK@3.60"oal
    GM215M primer
    74.5gn VhitaVuori N550

    IMG_6847.JPG IMG_3814.JPG
     
    Last edited by a moderator: Sep 26, 2019
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  12. Rob404

    Rob404 AH ENABLER BRONZE SUPPORTER AH Legend

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    75Gs of Win 760 = 2583fps for a 300g Sierra Gameking
    with excellent accuracy out of my Old Interarms
    76Gs of RL15= 2821fps with a 250G Gameking from the same rifle
     

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