.223 decapping issue

LRP

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Jan 3, 2026
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Below are two Remington .223 cartridges. The left has no issues decapping primers. The right will break decapping pin every time. I have 3 different presses and all have the same results. Can someone tell me if the red paint and or the IK21 on the right means something im unaware of . I’ve reloaded thousands of rounds and have never seen nor had this issue.
Thanks.
LRP
 

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fill the case 2/3 full of oil, set it in the shellholder on a solid surface,, get a wooden dowl that will slide down the case neck, tap it with a hammer, the oil will push the primer out, then you can examine the pocket and flash hole. Is it possible that that brass is berdaned primed?only explanation I have. Berdan primed cases have 2 offcenter flash hooles and it takes special tooling to deprime them.
 
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fill the case 2/3 full of oil, set it in the shellholder on a solid surface,, get a wooden dowl that will slide down the case neck, tap it with a hammer, the oil will push the primer out, then you can examine the pocket and flash hole. Is it possible that that brass is berdaned primed?only explanation I have. Berdan primed cases have 2 offcenter flash hooles and it takes special tooling to deprime them.
"Berdan" was the first thing that crossed my mind. You can shine a flashlight down into the case and see whether it's Boxer or Berdan primed.

Another possibility: I've had undetected foreign objects such as small stones or gravel cause a broken decapping pin.
 
No Idea on why the breakage. A smaller flash hole would I think. still allow the decapping pin to push out that primer and enlarge the flash hole although it would still be a tight fit. If there is a small stone in the case, it should be easily removed I would think. The last option would have to be a Berdan primed case Shining a light into the case should show "snake eyes" if it is a Berdan case.
You might have to sacrifice that case by clamping it in vice and using a hacksaw with a fine tooth blade or maybe a pipe cutter and cutting the rear half of the case off to see just what it going on. If hat brass is Remington and if the primers turn out to be Berdan it could either be a run off 223 made overseas for Remington or Remington made a run of brass for a foreign country that requires the Berdan primers
Paul B.
 
Mighty Armory decapping dies work well for me, use for decapping lots and lots of crimped primer brass. 308 and 223 brass, once fred free at my range for picking upmoff the ground if you show up the day after government lads use the range for training.Have not broke one yet.
 
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Below are two Remington .223 cartridges. The left has no issues decapping primers. The right will break decapping pin every time. I have 3 different presses and all have the same results. Can someone tell me if the red paint and or the IK21 on the right means something im unaware of . I’ve reloaded thousands of rounds and have never seen nor had this issue.
Thanks.
LRP
Makes me wonder if these are military rounds & the primers are 'Berdan' type with 2 flash holes ??? I've seen resizing cases with these primers break de-capping pins before years ago. The red sealer shouldn't be the cause of the issue if they're not Berdan primers.
If it turns out they are Berdan primers a special tool is needed to decap them - far too much bother!! - Ahaaa reading the posts, I see that Berdan have already been mentioned
 
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@ everyone. Thanks for the help. I have found that they are under sized flash holes made in a foreign company. Go figure. Thanks for the input guys.
 
The "IK21" headstamp found on some brass casings is an
international headstamp code for Igman, an ammunition manufacturer based in Bosnia and Herzegovina; it is not a Remington code.
While the "IK21" brass may be sold by some retailers in mixed lots with other brands, including Remington, the headstamp itself signifies Igman manufacture.

Key Details about IK21 Brass
  • Manufacturer: Igman d.d. Konjic.
  • Calibers: It is commonly found in once-fired 7.62x39mm and .223 Remington (5.56x45mm equivalent) calibers.
  • Reloading Considerations:
    • Primer Type: While many American-made casings use Boxer primers (which are reloadable), some IK21 brass might be Berdan primed (typically non-reloadable, though some enthusiasts find workarounds), or have small flash holes that require specialized decapping pins.
 
@ everyone. Thanks for the help. I have found that they are under sized flash holes made in a foreign company. Go figure. Thanks for the input guys.



they sell decapping dies with a small pin . . I'd look into this before you scrap the brass .
 
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