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  #1  
Old 03-12-2009, 07:01 AM
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Comparison of .358 Win and 35/284


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What is the practical difference between the .358 Win and a 35/284 wildcat. With same bullets and barrel length is the difference more than 100 fps? Greater than 200 fps?
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Old 03-12-2009, 07:54 AM
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I don't really know...but I can tell you right now that it ain't worth the trouble of building the 358-284.

Look up a .284 and .280...There is one manufacturer loading the .284....I think. But, look at the Rem., Win., and Fedd websites and you see that in those 2, that there ain't a nickles worth of dif in the two.

And, why would you load a cartrdige like the .358-284 when the .358 will stand right next to it and do the same, from stuff that is off'N the shelf. That is one big dif that you won't find in a manual....but you will find it in a Walmart and Cabela's (the dif as you will find the .358 there.
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Old 03-12-2009, 08:09 AM
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The .284 Win case will give you near identical powder capacity as the .30-06 case, so you can compare wildcats on it to those of the same bore in the -06 case.

For your example above, the .35-284 will just about exactly duplicate the .35 Whelen, depending on the action and throat dimensions. Compare that to published loading data to see if it's worth the trouble to you.
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  #4  
Old 03-12-2009, 08:26 AM
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Thanks for the replies. Are there any resources that have published load data for the 35/284? I will look at .35 Whelen data to get an idea of potential in the 35/284 compared to the .358 Win.
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  #5  
Old 03-12-2009, 08:32 AM
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A .35/284 or a .35 Whelen should be able to push a 250gr bullet to 2,400 to 2,500 fps, according to the data published by Hodgdon at http://data.hodgdon.com/cartridge_load.asp

The same site says the .358 Win should be able to push a 250gr bullet 2,200-2,280 fps.
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  #6  
Old 03-12-2009, 11:15 AM
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I took a quick look around and could not find any actual dimensions for the 35-284 Winchester. My figures would not work with the 35-284 Winchester at an overall length of 2.80” It’s muddy outside so I sharpened my pencil and seated the bullet – a 220-grain Speer - deeper and corrected the capacity figures:

I brought up the 358 Winchester on RCBS Load Cartridge designer.
The 358 Winchester has a total water capacity of 58.7 grains.
The 358 Winchester with a bullet seated .358” has a total water capacity of 49.7 grains.
This is not load data but just a comparison of capacity.
With the bullet seated .358” the 358 Winchester has room for up to 43.7 grains of Hodgdon 4895, 43.8 grains of Alliant Reloder 15, 44.3 grains of Hodgdon Varget and 46.0 grains of Winchester 748.

I drew a 35-284 Winchester using a 35 degree shoulder and this case has a total water capacity of 70.1 grains.
With a 220-grain Speer bullet seated .390” the 35-284 Winchester has a water capacity of 60.4 grains of water.
This is not load data but just a comparison of capacity.
With the bullet seated .390” the 35-284 Winchester has room for up to 53.3 grains of Hodgdon 4895, 53.4 grains of Alliant Reloder 15, 54.0 grains of Hodgdon Varget and 56.0 grains of Winchester 748.
What these rough figures show you is a significant increase in case capacity for the 35-284 Winchester.

The 35 Whelen as an example has a total water capacity of approximately 72.1 grains.
The 35 Whelen with a bullet seated .358” has an approximate water capacity of 63.0 grains. The 284 Winchester is a pretty large case.

I assumed this rifle is a hunter so I used a 22” barrel and this leaves an effective barrel length of 20.22” with the Speer 220-grain bullet.
I estimate a charge of 53.0 grains of Alliant Reloder 15 or IMR 4320 as pushing the 220 Speer 2,425 fps with 2,870 fpme at 45,500 CUP. So this would probably be a good starting load. This load estimate was just at 100% load density – actually just under – and these are not the ideal powders for this wildcat.
This cartridge seems to be a natural for IMR’s new 4007 powder. 4007 compresses easily and has given me no surprises with the 307 Winchester and 308 Marlin Express.
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Last edited by William Iorg; 03-14-2009 at 09:26 AM. Reason: new capacity estimate
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Old 03-16-2009, 09:01 PM
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Thanks for all the replies and ideas.
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