Found on the last range pick up....

[Ironbar]

So, I'm guessing either a cracked case or too hot a load right?

 

[jordanvraptor]

The way the right side is folded inward, I'd say it got caught in the ejection port and torn up by the bolt or slide...

 

[Wombat of Doom]

when my sten jams on a failure to eject it will do something that looks kinda identical to the spent brass. Parts of it are smashed in in your picture it looks like. In is usually IME a result of mechanical forces.

 

[DizzyJ]

On our range, the lawn gets mowed regularly. This is what the brass looks like when the mower grabs it.

 

[Certaindeaf]

Bullet strike/fragged.

 

[orygun]

DizzyJ's explanation looks good to me, especially if the primer's dented. Whatever happened, it wasn't in the chamber when it did.

 

[Caveman Jim]

That will not happen in the chamber or when FTE, I agree with Dizzy & CD, either and or both.

 

[LSWC]

Cases I've shot & collected that have failed are generally cracked not torn.
I bet that one required some help getting it out...

 

[Stomper]

On our range, the lawn gets mowed regularly. This is what the brass looks like when the mower grabs it.

Goats are no better on brass.

 

[Reno]

I’d say it was shot at unintentionally or intentionally.

If not, someone has a really bad day.

 

[ajgunner]

I always take my damaged, old, and screwed up brass to the range, and scatter it around on purpose just to make brass scroungers scratch their head in wonder. Ever wonder why anyone would leave revolver brass on the ground?

 

[Bon Sauvage]

No one here has heard of, "Bite the bullet?"

 

[Wombat of Doom]

No one here has heard of, "Bite the bullet?"

You are supposed to bite the bullet, not the casing

 

[Bon Sauvage]

You are supposed to bite the bullet, not the casing

I have something you can bite.

 

[Wombat of Doom]

I have something you can bite.

No thanks, I have a bullet