Somebody didn't have a good day at the range

[Just another 22 shooter]

Found this yesterday at the range yesterday; out about 15 yards in front of the firing line, like someone purposely threw it there. I've never seen or even heard of a firing pin breaking off AND sticking in the primer. As you can see, the pin is rusted pretty good, so it may have been laying there for awhile. After I took the pic, I noticed that the 6.5 Grendel case has been necked to 22ARC. Luckily for whoever the unlucky soul was, an AR15 firing pin is pretty easy to replace.

 

[TheTinMan]

OUCH!

Do you think that crescent on the case head is from the ejector? It looks too big for that…

 

[Sevens]

Maybe you can see better with it in hand than I can see in the photo but with the single image, I'm not convinced that is a firing pin nub. It appears more like a primer cup that flowed in to the hole in the bolt face. And it looks like a pin hole and leakage at 7 o'clock.

Definitely an ejector mark, and a harsh one at that. Somebody crafted something poorly, we will agree on that.

 

[Just another 22 shooter]

Sevens, you are correct. I deprimed the case and this is what it looks like from the other side. "Somebody crafted something poorly, we will agree on that"; well said.
What a fired primer is suppose to look like and the primer in question:

 

[Sevens]

Yes, protrusion looks like the anvil inside every primer.

I certainly wonder what the whole story was here but we will never know.

 

[cracker57]

Yes, protrusion looks like the anvil inside every primer.

I certainly wonder what the whole story was here but we will never know.

One thing we do know, over pressure

 

[30-30remchester]

I cleaned our range for many years. I would occasionally find gun parts. In my den I still have a piece of a stock from a 98 mauser that I recovered on the ground. It had been blown off from some gun malfunction.