What do you think?

[pcolapaddler]

I picked up a large quantity of brass recently. While removing primers and resizing, I noticed a couple of odd looking cases and primers.

The primers were completely mushroomed flat against the end of the case and the case was pretty swollen.

See pics below:
http://uploads.tapatalk-cdn.com/20160417/7e0077a426858aa241a7e472fceb4057.jpg

http://uploads.tapatalk-cdn.com/20160417/2295f65f9906931774da6c90566b283f.jpg

I would assume excessive pressure. I just wouldn't have expected the primer to have such a severe appearance.


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[w5pv]

Put them in the recycle bin,first mash them flat where there is no possibility of them being used by some unsuspecting person.

[tja6435]

Is the hole from the decap rod pushing through the primer? I've never seen a primer mushroom out like that myself.

[pcolapaddler]

Is the hole from the decap rod pushing through the primer? I've never seen a primer mushroom out like that myself.
No. I received it with some brass that I bought on another forum.

I believe it is from the firing pin. Since the case is also bulged, I assume that it was charged too heavily. Excessive pressures pushed the primer out of the pocket and it mushroomed into the available space between the slide and case head.

There have been about 3 in this bunch of brass that felt tighter than usual going into the resizing die. Their primers were also deformed. This is the only one that shows a hole in the primer - others showed a shallow dimple.

None of the books I've read showed a picture of something like this.

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[skeettx]

WAY overload
10mm?
HOT, crush and recycle
Mike

[Hickory]

What do I think?
OK, this is only a guess.
It could be that a new handloader could not afford powder scales to make sure of the proper weight while reloading. This new reloader probably put powder in the case that looked good and thought to himself, good enough.
Because you only found only a couple of cases, I would suspect one of two things happened;
1) Said person realised something wrong after two rounds fired and quit shooting.
2) Or, said persons gun was unable to fiction after two rounds.
Either way keep a close eye on abnormal brass in the future, you may have a Darwin award winner in the making.

[runfiverun]

I don't even know what that brass is for.
but it looks like it was fired in the wrong gun, like 380 auto fired in a 9X18.

where the extractor held the round in place well enough to be fired then it swelled up as much as it could to fill the chamber.
probably blew gas every which way around the case.

[rwadley]

It says 380 AUTO CBC

[skeettx]

I would bet some one loaded 9mm loads into a 380 auto by mistake
YUK!!!!

[w5pv]

Check and recheck that you have the correct information for the calibre you are loading for.

[gilgsn]

That much damage, it must have been pretty close to a blow up.. The bulged case is puzzling though..
Gil

[BrassMagnet]

I believe post #7 or post #9, or both, is likely.
Either a 380 fired in a larger chamber or a 380 reloaded as a larger caliber.
I have caught 380 brass trying to pass as 9mm brass, at least once as I seated the bullet!

[Oklahoma Rebel]

that's scary. a good reminder to be suspicious of all used brass, thanks for pointing this out OP

[BrassMagnet]

that's scary. a good reminder to be suspicious of all used brass, thanks for pointing this out OP

It is more likely he fired the wrong ammo in his gun or reloaded the wrong brass an then fired it. See posts #7 and #9.