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Reloading Berger Bullets

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Necking Down

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  #1  
Unread 03-03-2013, 04:13 PM
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Join Date: Nov 2011
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Necking Down

I am having a 7mm-300wby built. I already have a redding neck sizing die for this caliber and have a full length die set on order. My question is, what are the steps to necking down the 300 Weatherby brass to 7mm? Neither the neck die or the full length die are bushing style dies. What else do I need if anything and how do I do this? Does it need to be done in small steps and if so how do I do it in small steps without bushing style dies? The dies I have on order are redding D series dies. Any help would be much appreciated.
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  •   #2  
    Unread 03-03-2013, 07:02 PM
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    Re: Necking Down

    Quote:
    Originally Posted by ELKS2TH View Post
    I am having a 7mm-300wby built. I already have a redding neck sizing die for this caliber and have a full length die set on order. My question is, what are the steps to necking down the 300 Weatherby brass to 7mm? Neither the neck die or the full length die are bushing style dies. What else do I need if anything and how do I do this? Does it need to be done in small steps and if so how do I do it in small steps without bushing style dies? The dies I have on order are redding D series dies. Any help would be much appreciated.

    there are three very important steps here

    1. lube case
    2. insert sizing die into press
    3. use press to cycle brass through sizing die

    One caliber isn't anything but a walk in the park, especially down.

    If you specified tight neck you may have to turn your necks a bit, but otherwise size, trim, load as usual.
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      #3  
    Unread 03-04-2013, 12:58 AM
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    Re: Necking Down

    Thanks Lefty! For the first firing of new cases can I get away with just neck sizing down and fire forming to my chamber or should I full length size the first time?
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      #4  
    Unread 03-04-2013, 05:33 AM
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    Join Date: Dec 2005
    Location: Tucson Az
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    Re: Necking Down

    If you find necking down in one step requires a great deal of force or the brass doesn't respond well, use the seating die first. It is slightly larger than the FL die and makes a great intermediary step.
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      #5  
    Unread 03-04-2013, 01:37 PM
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    Re: Necking Down

    Quote:
    Originally Posted by AZShooter View Post
    If you find necking down in one step requires a great deal of force or the brass doesn't respond well, use the seating die first. It is slightly larger than the FL die and makes a great intermediary step.
    +2 Totaly agree.
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      #6  
    Unread 03-04-2013, 07:43 PM
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    Re: Necking Down

    Quote:
    Originally Posted by ELKS2TH View Post
    Thanks Lefty! For the first firing of new cases can I get away with just neck sizing down and fire forming to my chamber or should I full length size the first time?
    It doesn't really make much difference... The brass is usually under fl dimensions anyway so you will be essentially neck sizing either way. I'd rather have the extra support of the FL die to keep things squared up better.

    As Az shooter says, you can use a seater die first as an intermediate step for rather large re-forms. I however am also a fan of copious amounts of lube. I slather it on when I'm forming cases that take a lot of metal movement. (I've even been known to style my hair with case lube, or so they say... ) Seriously though, you will often need to use more lube when forming but this one isn't much of a move so don't worry.

    Last edited by Lefty7mmstw; 03-04-2013 at 10:08 PM. Reason: typo-- spelling
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      #7  
    Unread 03-04-2013, 09:50 PM
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    Re: Necking Down

    Thanks for the help guys! Good to know about the seating die, thanks for the info Lefty.
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