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Thread: 338 ultra mag

  1. #1
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    338 ultra mag

    AKA thumper. Energy of a 375 H&H with the ballistics of a 7mm Rem mag.

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    What is felt recoil compared to 7mm?

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    While the .338 ultra mag is a little faster we have had the .340 Weatherby for quite a while that does the same thing. Then if you really want to look at a real super magnum take a look at the .338-378 Weatherby mag

    Quote Originally Posted by xtreme View Post
    What is felt recoil compared to 7mm?
    Close to double that of a 7mm Rem mag.

    I can shoot my .340 Weatherby about 10 times before I need to put the muzzle brake on it and I can shoot my 7mm Rem mag just about all day without a muzzle brake.
    Last edited by JimP; 12-12-2016 at 09:00 AM.
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    Quote Originally Posted by JimP View Post
    While the .338 ultra mag is a little faster we have had the .340 Weatherby for quite a while that does the same thing. Then if you really want to look at a real super magnum take a look at the .338-378 Weatherby mag



    Close to double that of a 7mm Rem mag.

    I can shoot my .340 Weatherby about 10 times before I need to put the muzzle brake on it and I can shoot my 7mm Rem mag just about all day without a muzzle brake.
    YEP what he said !!!

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    I had better stay with the 7 mm

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    Quote Originally Posted by JimP View Post
    While the .338 ultra mag is a little faster we have had the .340 Weatherby for quite a while that does the same thing. Then if you really want to look at a real super magnum take a look at the .338-378 Weatherby mag



    Close to double that of a 7mm Rem mag.

    I can shoot my .340 Weatherby about 10 times before I need to put the muzzle brake on it and I can shoot my 7mm Rem mag just about all day without a muzzle brake.
    My guess is big magnums will kill big game just as dead as will a 7MM Rem Mag.

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    Never been a big fan of the UM's. My son has a .300 RUM which we handload for. Spent a lot of time working on loads. For 12 more grains of powder, he gets 90+ fps faster that my .300 Wby. I would take a .340 Wby over a .338 UM.
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    I went with the 340wby myself, as it's probably the 2nd most popular 338mag, and ammo will always be available.

    nothing wrong with the 338RUM/Edge,

    my 340 is synthetic stocked, and actually kicks less than my 300win.mag. wood stock and braked, as far as personal feel goes.

    225gr around 3000-3100fps, is pretty awesome.
    can be loaded up to 275/300grs, although I think if you need more than 250 from the 340, you probably just want a bigger cal.

 

 

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