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.338 Edge from 7mmRUM brass?

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  #1  
Unread 01-16-2011, 12:24 PM
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.338 Edge from 7mmRUM brass?

For those of you who have one, is it possible to form .338-.300 brass from 7mmRUM brass? I've got about 200 pieces and I'd sure hate to waste them.

Hicks
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  •   #2  
    Unread 01-16-2011, 12:33 PM
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    Re: .338 Edge from 7mmRUM brass?

    You can, but your necks will be very thin. You're likely to split more than a few.
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    Unread 01-16-2011, 12:42 PM
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    Re: .338 Edge from 7mmRUM brass?

    yeah it can be done. i did exactly that making a couple dummy rounds for guys. i'd push it out in at least 2 steps, 3 would be better. then check your OAL, concentricity and wall thickness of your necks. the neck thickness doesn't change that much.
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    Unread 01-16-2011, 02:18 PM
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    Re: .338 Edge from 7mmRUM brass?

    I have heard it said that if up sizing 2 calibers that the necks should be anealed after necking up.

    I also agree that these should be sized in at least 2 stages. First 30 cal then 338.
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    Unread 01-16-2011, 04:54 PM
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    Re: .338 Edge from 7mmRUM brass?

    What kind of trouble would I get into if i just fire formed them?
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      #6  
    Unread 01-16-2011, 09:52 PM
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    Re: .338 Edge from 7mmRUM brass?

    You need to expand the necks. Fire forming won't do it.
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