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Weighing brass

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  #1  
Unread 01-15-2008, 10:37 AM
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Weighing brass

How does one do this? Seems to me that if I went through and weighed all my cases, and sorted them into groups of +/- .5gr, I'd probably have 4 or 5 little piles. How much of an accuracy gain can be achieved by doing this anyway?
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  •   #2  
    Unread 01-15-2008, 10:42 AM
    Chawlston
     
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    Quote:
    Originally Posted by petenz View Post
    How does one do this? Seems to me that if I went through and weighed all my cases, and sorted them into groups of +/- .5gr, I'd probably have 4 or 5 little piles. How much of an accuracy gain can be achieved by doing this anyway?
    The accuracy achieved or even noticed depends on the rig you are shooting. If you have sub .25 moa rifle, you will probably notice it. On the other hand, if you have one that is a .5 moa or better, you will probably not notice it.

    I do it to identify the grossly over or under weight cases.

    Chawlston
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      #3  
    Unread 01-15-2008, 12:01 PM
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    A complete waste of time... Do it if it makes you feel better but the actual weight of the case has nothing to do with the volumetric capacity of the case and that is what matters. Think about it for a while and it will become clear..
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      #4  
    Unread 01-15-2008, 04:55 PM
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    Boss, i agree with you 100% on this one!
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      #5  
    Unread 01-15-2008, 05:41 PM
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    How could that be?? If two cases have the exact same exterior diminsions (after firing) and one case weighs more than the other, the heavier case must have less capacity; no?
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      #6  
    Unread 01-15-2008, 06:16 PM
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    Petenz

    You must size,trim,deburr case neck inside and out and deburr
    the flash hole so that all cases are the exact same dimension
    externally before you weigh the cases.

    If this is not done weighing is a waste of time.

    I separate to 1gr (example) 269.0 to 269.9 one group, 270.0 to
    270.9. another group for general hunting.

    And in 1/2gr batches for long range hunting and target shooting
    to lower standard deviations (The main reason for weight sorting).

    And if you end up with one or two that are way out (3or4grs)away
    from the rest I use these to set COAL with no primer and the bullet
    to be used and place them with my dies for future use and reference.

    J E CUSTOM
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      #7  
    Unread 01-15-2008, 09:06 PM
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    here's what ya do. take several cases that weigh exactly the same. plug the primer pocket and fill them with powder. i use a small ball powder as it fills very uniformly. see how even the amount of powder is in all of them. i've done this in my RUM cases and they will vary more than 2 gr in cases that weigh the same. i sort by measuring the volume of the case. really don't care what it weighs.
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