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Thread: 350 Griffin & Howe

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    Default 350 Griffin & Howe

    Anybody familiar w/this wildcat? Awhile back I was curious about a 358/375 h&h wildcat, and later found that it exists (very rare) and it's called the 350 Griffin & Howe.
    I'm thinking it would send the 280 gr. Swift @ 2700? What do you think? Sounds like an awsome bruin gun to me!

  2. #2
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    Quote Originally Posted by go_north View Post
    Anybody familiar w/this wildcat? Awhile back I was curious about a 358/375 h&h wildcat, and later found that it exists (very rare) and it's called the 350 Griffin & Howe.
    I'm thinking it would send the 280 gr. Swift @ 2700? What do you think? Sounds like an awsome bruin gun to me!
    The .358 Shooting Times Alaskan is an 8mm Remington Magnum necked up to .358. A-square even makes ammo for it with a sharper shoulder angle and decreased body taper. The A-square load pushes a 275 grain bullet at 2850 mv and 4955 ft-lbs of muzzle energy.

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    Have to agree that you would be better off with the 358 STA.

  4. #4

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    h&h brass is easier to come by, easier to neck to .358, and would be lower recoiling. Is the difference between 2700 and 2850 really something to be very concerned about?
    (btw, 280 @ 2700 is just a guesstimate- does that sound about right?)

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    Default 350 G&h

    go_north,

    The 350 G&H is just the H&H case necked to accept .358 bullets, and no other changes. It was originally loaded with 275 grain bullet at about 2560 fps. which calculates to the same pressure as the 375 H&H with a 300 grain at 2560 fps. I would say the limit would be about 2600 fps or there abouts, would be the practical limit for the 280 grain. The 358 STA will only get the 280 grain to about 2750-2800 fps. The 358 Norma would be the best candidate for this 35 mag. It would be 280 at about 2700-2750 fps. It has excellent brass available (Norma) and I don't find the 358 brass from 8mm Mag to be satisfactory, the necks are thin. The A-Square brass is good but pricey. The G&H would be different and good brass (375) would be easy to find, but dies will be over a $100 where as dies for the other two would be about $40. As for recoil, that can be done with less bullet and/or less powder in any of them.

    Yes, it would be a great bruin rifle or about anything else rifle. Lots of good bullets out there and certainly a worthwhile project. I think there is some info in the old forums archives about this one.
    Is there nothing so sacred on this earth that you aren't willing to kill or die for?



  6. #6

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    are you sure the norma will put 280 @ 2700? I know that it does 250 @ 2800, so I figured it wouldn't put 280 @ much over 2600...

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    Default 35 Mags

    go_north,

    Well, no! I'm not sure about much of anything. And I've never used a 280 grain in the 358 Norma but I have used a couple different 275 grainers and 2700 fps is easy to get. That is like 338/250/2700 which is the norm for the 338 Win mag. You see, with the same case and the same velocity as you neck down you send less bullet weight (375 down to 358) or when going up, same case same velocity, you send more bullet weight. The 358 Norma holds a little more powder than the 338 Win. I have never shot a 350 G&H but know the case is the 375 H&H so I know what it holds. I haven't seen the claims of the 358 STA to be valid in the two rifles I've loaded for.

    Don't let me discourage you from the G&H I think that would be a good round to explore or experiment with. And the brass would be an easy make and be trouble free. Reamers and dies would be more $$$ but that hasn't been an issue. You'll spend a chunk of change anyway so another $100 won't matter.
    If you have a suitable action and a smith to do the work, go for it.
    Is there nothing so sacred on this earth that you aren't willing to kill or die for?



  8. #8
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    I think 280's @ 2700 is a bit ambitious, more like 2600. I have a 350 Rigby, which is essentially a beltless 35/375 with the shoulder slightly pushed back and sharpened up to 45 degrees. It's a great round, feeds super slick and I've always found the 35's to do well.

    Then again the Rigby has somewhat cured me of obscure chamberings and wildcats. There is something to be said for being able get factory ammo, dies and brass.

    No doubt a good 35 will take any bruin, just use a good 250, 270 or 280 gr.

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