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I was decapping rounds and periodically a shell would pull the decapping pin out of the holder. After Paying attention I notices they were all the same - marked with "A USA" (see attached picture) and after further inspection I noticed it only occured on the brass with gold colored primers and not the silver colored primers. I'm not sure if they have a waterproofing sealant on them, but they will not decap without taking my pin out too. Using RCBS Rockchucker II with carbide 9mm dies.

I just put the shells I separated out into my junk box. Might use them later for some art or casting... along with the old primers I saved too ... lol.

Thanks,
jeff
bad_casing.jpg
 

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most likely a berdan cases and primers . the berdan have 2 small flash holes and you can't knock them out
 

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A-USA is not berdan primed. I also seem to remember some problems when reloading some of those but I cannot remember what that problem was.
 
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TFF Chaplain
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Are they military cases? Could the primers be crimped?

And yes, could the flash hole be undersized?
 

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A-USA is not berdan primed. I also seem to remember some problems when reloading some of those but I cannot remember what that problem was.
I've had problems with A-USA brass being maybe softer brass and or thinner walls. I scrap it and a couple other headstamps.
 

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GUNZILLA
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From the picture provided that seems like a very strong crimp on the primer, I would be leary about using a regular decapping pin is it could bend it or break it. I've never used armscor brand so not familiar with it at all.
 
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