RefBrass223 < Gunwiki

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---+ 223 / 5.56mm Brass Reference

223 brass is generally primed with a standard Boxer Small Rifle primer.  There's a slight difference between the 223 and 5.56mm cartridges, but the brass looks quite similar when you're sorting through it, hence they're both going into one article.

If you're dealing with a mixed load of brass, you _may_ have Berdan-primed cases mixed in.  I would not recommend trying to process Berdan brass in 223.  In most shooters' case, it will only be encountered frequently enough to be a mild irritation, and not as a significant source of reloading brass.

---++ Known Berdan-primed 223 Headstamps
   * "FN 77"
   * "86 13", where 86 is printed above the primer and "13" is printed on the bottom.

---++ Crimped Brass
An alert reader pointed out that there's a lot of crimped 5.56mm brass out there.  Crimped primer pockets are too tight to fit a primer into, and it's necessary to swage them (expand the pocket out to spec) before you can insert a primer into the brass.  If you try to insert a primer into a crimped pocket, you may end up detonating the primer.  _Usually,_ but not always, crimped brass has a crosshair printed on the headstamp (+ within a circle).  However, the presence of a crosshair doesn't guarantee that the brass is crimped - only that it was crimped at some point.  If you're using brass someone else has reloaded before, they'll have swaged the primer pocket out.

-- Main.SeanNewton - 30 Mar 2007
This topic: Gunwiki > WebHome > RefReloading > RefComponentBrass > RefBrass223
Topic revision: r5 - 21 Aug 2010 - SeanNewton