resizing new brass

Discussion in 'Ammunition & Reloading' started by seedy, Mar 12, 2008.

  1. seedy

    seedy Member

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    I have a question. I have been resizing new unprimed brass before I load it for the first time. Is this necessary? I read an advertisment that touted that you can just prime and load their new brass. Sizing new brass is tough and I would really like not having to so it. Thanx:(
     
  2. robocop10mm

    robocop10mm Lifetime Supporting Member Lifetime Supporter

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    Depending on the caliber your MAY need to resize. The new brass MAY not be perfectly dimensioned for your gun. After it is formed it is polished. It MAY get deformed during the polishing process. Some calibers are thicker or thinner than others. For example, .45 ACP I would not worry about it as it is fairly thick. .44-40 would need to be sized as it is very thin and easily deformed. The resizing should not be difficult as the brass is very close to proper dimensions already.
     

  3. 1hole

    1hole New Member

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    Is it "necessary"? No. Is it advisable? I think so.
     
  4. seedy

    seedy Member

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    thanks guys now I don't feel so dumb. I bought new star line brass for my 45-70 and 41 mag. and was arm weary by the time I sized a hundred cases.
     
  5. marysdad

    marysdad Member

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    It is completely unnecessary to full-length size new cases for almost all firearms. (You don't think that the ammunition manufacturers do this, do you?). The exception would be a custom-barreled benchrest or match rifle with a very tight chamber.

    If your new brass is boxed, so that the cases are separated during shipment, no sizing at all is necessary. If your new brass is bulk-packaged (i.e., loose in the box), it is good to run the necks through the expander ball to round out any dents or eccentricity in the case mouth that may have occurred during shipment. However, there is no need to full-length size.
     
  6. cpttango30

    cpttango30 New Member

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    Most of the time you can bet your life that you are going to have a few bent necks. For this I go and resize first no matter what.
     
  7. 2gun

    2gun New Member

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    I always do but I'm not sure why
     
  8. RePete

    RePete New Member

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    When you resize new brass, all you are doing is uniforming and making sure that the necks aren't dented.

    I say that it's necessary.