What causes this?

[Quackerbox]

**not from anything I own. Coming to see this often with this particular brand of ammo

"Ammo inc"

Just curious really. This particular incident is 3 of 13 cases did this. Worst is pictured

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[npe001]

man, its almost like the metal was too soft and the primer igniting melted it.

[Bullseye07]

Primer not seating properly and pushing back onto the firing pin/bolt face at ignition?


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[McClain]

What cartridge is that? Looks like a military crimped primer. Could that be a berdan primer anvil showing through? A glock firing pin imprint is retangular (instead of round) but that is not a clean firing pin imprint, so not sure what is going on.

[kcnatural]

Looks like the firing pin broke through to the primer anvil. Probably cutting corners on primer cup material and the firing pin went all the way through.

[GarGuy]

Firing pin drove too deep

[Quackerbox]

as mentioned, 'ammo inc' ammo. Im thinking ammo issues cause I see it often on this brand. only happened on 3 of 13 shots fired. Yes, presumably glock but not necessarily. VERY indicative of a glock.. Smith used a rectangular in the sigma and XD. And starting with G5s not all glocks are the same

Ive seen the primer near completely missing from them as well

[sierracharlie338]

Could be over charged ammo that’s causing excessive pressure. Check for signs of case head separation as well.


Sierracharlie out....

[Quackerbox]

Could be over charged ammo that’s causing excessive pressure. Check for signs of case head separation as well.


Sierracharlie out....

this was the road I was leaning towards

[GarGuy]

I dont think it's a pressure issue. I don't see any smoke around the primer seat.

[Mike D]

Overpressure round
Thin primer cup
Excessive putting pin protrusion


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[RifleBowPistol]

I am going to go with thin primer cup. It would be nice to see an unfired round, to compare it to.

You can see were the primer was pushed up into the firing pin hole, around the firing pin. The primer is not flattened out a lot, but not having an unfired round to compare how rounded a unfired primer is, it's hard to say how much it flattened out. Looking at the case head, there are no marks at all, that tells me the pressures are not that high, if not high at all.

If the primer metal had not been pushed up into the face of the slide around the firing pin, then I would be leaning more towards the primer protruding too deep. But you said you have seen other cases of the same brand with the same problem. I got the impression you were talking about brass that was fired in other guns, so the problem seems to be the primers used for that brand of ammo, which I have never heard of.

[M16]

Poor quality primers would be my guess.

[Quackerbox]

I am going to go with thin primer cup. It would be nice to see an unfired round, to compare it to.

You can see were the primer was pushed up into the firing pin hole, around the firing pin. The primer is not flattened out a lot, but not having an unfired round to compare how rounded a unfired primer is, it's hard to say how much it flattened out. Looking at the case head, there are no marks at all, that tells me the pressures are not that high, if not high at all.

If the primer metal had not been pushed up into the face of the slide around the firing pin, then I would be leaning more towards the primer protruding too deep. But you said you have seen other cases of the same brand with the same problem. I got the impression you were talking about brass that was fired in other guns, so the problem seems to be the primers used for that brand of ammo, which I have never heard of.

Other than the burnt look and hole in the primer, whats 'pushed up' is present on 99.9% of the elliptical (glock type) primer strikes you will see.

Ive seen it enough on this brand of ammo to steer clear of it.