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Partial full length resizing

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  #1  
Unread 05-30-2009, 10:01 PM
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Partial full length resizing

I have read several posts where they indicated that, as an alternative to neck sizing, they would partially resize the case using a full length resizing die so that it would just bump the shoulder. What is the procedure for setting up the die to accomplish this?

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  •   #2  
    Unread 05-30-2009, 10:14 PM
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    Re: Partial full length resizing

    You need an ability to measure your shoulder to base length. Typically using a Caliper with a Hornady head space gauge attached to it's blade.

    Setting up the die is easy. Measure the length, resize and reset die until the appropriate amount of shoulder bump is achieved. I personally like .001" shoulder bump and 2/3 of the neck resized.

    AJ
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    Last edited by AJ Peacock; 05-31-2009 at 07:58 AM.
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      #3  
    Unread 05-30-2009, 10:35 PM
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    Re: Partial full length resizing

    What i have been usung is the redding competition shell holders. Basically what you get is 5 shell holders from -.002" to -.010" off of a standard redding shell holder. This lets you bump the shoulder back until it just fits into your chamber. I have had pretty good results with them.
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    Unread 05-31-2009, 07:52 AM
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    Re: Partial full length resizing

    Thanks, guys. I think I understand both suggestions. I will give them a try.
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      #5  
    Unread 05-31-2009, 08:02 AM
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    Re: Partial full length resizing

    The comp shell holders definitely make it easy to adjust that last .001" or so (they are in .002" increments), but the process is the same, having calipers and the Hornady headspace gauge will let you replicate your setup from one reloading session to another.

    AJ
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      #6  
    Unread 05-31-2009, 09:48 AM
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    Re: Partial full length resizing

    I use a full-length die and keep screwing it down bit by bit until my case chambers without any resistance on the bolt. How is this different from using the headspace gauge to measure the amount I'm bumping the shoulder, other than giving me a number so I can say "I'm setting the shoulder back 0.00X inches." Isn't the object of either method to resize your cases no more than is necessary? I never thought of this as only "partially resizing the case."
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      #7  
    Unread 05-31-2009, 09:51 AM
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    Re: Partial full length resizing

    If a standard full length die is used and the shoulder is bumped, the whole neck has been resized. The only way that I know of bumping the shoulder and partially neck sizing is with the use of a bushing die.
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