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


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Old 09-09-2013, 05:00 PM   #1
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Default Bolt action rifle 223, any tips for resizing 5.56 brass?

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?



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Old 09-09-2013, 05:20 PM   #2
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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.



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Old 09-09-2013, 05:30 PM   #3
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Heres your difference 5.56 on the top .223 on the bottom R1 and R2 radius are different

5.56x45mm_nato.jpg   223_remington.jpg  
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Old 09-09-2013, 06:20 PM   #4
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After you shoot them once in your rifle the 223 and 556 will be the same.

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Old 09-09-2013, 06:25 PM   #5
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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".

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Old 09-09-2013, 09:04 PM   #6
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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.

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Old 09-09-2013, 09:05 PM   #7
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Thanks Alsaqr and everybody else for the help

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Old 09-09-2013, 09:17 PM   #8
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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.

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Old 09-09-2013, 11:12 PM   #9
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Quote:
Originally Posted by Anna_Purna View Post
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 5.56".
The important difference is not the brass.

Quote:
Originally Posted by robocop10mm View Post
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.
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.
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Old 09-09-2013, 11:15 PM   #10
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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



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