Bolt action rifle 223, any tips for resizing 5.56 brass?

Discussion in 'Ammunition & Reloading' started by Anna_Purna, Sep 9, 2013.

  1. Anna_Purna

    Anna_Purna New Member

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    I have a weatherby 223 and am going to start reloading for it, and was wondering what precautions if any for using 5.56 brass, and resizing it using a 223 die??? Or should I stick with just 223 brass?
     
  2. Catfish

    Catfish Member

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    No difference. I shoot most of my 223 ammo through an AR and I load on a Dillon press. When I load I dump all brass, military and 223 into a box and start loading. I shoot it the same way. With the brass all mixed up my AR will still hold groups of 3/4 moa without a problem. If your wanting better accuracy it would pay to sort your brass, but 95% of my shooting if off handed at running targets so 3/4 moa is no draw back to me.
     

  3. purehavoc

    purehavoc New Member

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    Heres your difference 5.56 on the top .223 on the bottom R1 and R2 radius are different
     

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  4. hiwall

    hiwall Well-Known Member

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    After you shoot them once in your rifle the 223 and 556 will be the same.
     
  5. Anna_Purna

    Anna_Purna New Member

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    I am using range 5.56 brass, probably shot through an AR. I am reloading for a bolt action rifle that on the barrel says "not to use 5.565".
     
  6. alsaqr

    alsaqr Well-Known Member Supporter

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    It's easy: Full length resize the brass and trim to spec. Then you must deal with that military primer crimp. My preferred method of removing the crimp is a cartridge case deburring tool.
     
    Last edited: Sep 9, 2013
  7. Anna_Purna

    Anna_Purna New Member

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    Thanks Alsaqr and everybody else for the help :)
     
  8. robocop10mm

    robocop10mm Lifetime Supporting Member Lifetime Supporter

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    Trimming is the main issue. In my experience, the generous chamber dimensions of an AR will let the brass stretch. M-249's more so. Resize in standard .223 die and trim. Good to go.

    There is a belief 5.56 brass is thicker resulting in less internal volume. Not necessarily true. Different makers have different thicknesses. Sort by headstamp and develop load for that headstamp.
     
  9. Shade

    Shade New Member

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    The important difference is not the brass.

    Robo is 100% correct.

    Anna,

    The reason they say not to use 5.56 NATO ammunitions is that, 5.56 NATO
    is loaded hotter or to higher pressures than standard .223 Remington
    ammunition per SAAMI specifications you could have a chamber or barrel
    failure using 5.56 NATO ammunition.

    The brass is effectively identical and can be used interchangeably. It is the
    powder charge and resulting pressure that is different.
     
  10. Anna_Purna

    Anna_Purna New Member

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    Awesum, Shade, and Robo, and all the others for helping me. Looks like i am gonna go brass hunting tonight at te local pit, there is always a large amount of everything :)
     
  11. mseric

    mseric New Member

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    Don't forget to remove the primer crimp before seating new primers.