AR15.Com Archives
 .223 / 5.56 Trim Length ?
tlen  [Member]
10/25/2012 11:46:00 AM
I've been trimming my 223 / 5.56 brass to 1.750" but have discovered the SAAMI case length spec is 1.760"- .030". This gives a min length of 1.730".
What's the consensus of trimming to 1.730" instead of 1.750" ? Seems like this would allow many more reloadings between trimming and essentially less case prep work.
http://www.saami.org/pubresources/cc_drawings/Rifle/223%20Remington.pdf
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morrisammo_1  [Team Member]
10/25/2012 1:45:22 PM
I may help I may not,,

I shoot 3 gun,, most of the brass I get is range brass, some of it was mine most of it is RANGE BRASS
I don't know how may times I was shot or loaded,,

for my AR's I always trim shorter! than spec,,, and I never have stuck in the gun problems,

dryflash3  [Moderator]
10/25/2012 2:35:35 PM
Best to trim to 1.750. Going shorter lessens neck tension.

Myself, I won't load a 223 case that is shorter than 1.748.

But a lot of people do, but not me.
bnred9  [Member]
10/25/2012 2:51:14 PM
Along this same line, once fired brass .223/.556 norm need to be trimmed?
the-fly  [Team Member]
10/25/2012 2:53:16 PM
Originally Posted By bnred9:
Along this same line, once fired brass .223/.556 norm need to be trimmed?


yes.

I usually trim to about 1.745.
dryflash3  [Moderator]
10/25/2012 3:14:57 PM

Originally Posted By bnred9:
Along this same line, once fired brass .223/.556 norm need to be trimmed?


You won't know unless you measure your cases. Some do, some don't.
hrt4me  [Team Member]
10/25/2012 8:11:22 PM
Originally Posted By dryflash3:
Best to trim to 1.750. Going shorter lessens neck tension.

Myself, I won't load a 223 case that is shorter than 1.748"


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