What caused this? (Case rupture)

[bruce381]

that many I would say over laod or more likley wrong powder.
Keep only the correct powder on the bench at a time if you loaded something else clean up and put away before starting new.

[five.five-six]

What caused this? (Case rupture)

Glock

[J-cat]

It takes a lot of stupid to blow a 9mm case like that.

[rm1911]

What caused this? (Case rupture)

Glock

Best. Reply. Ever.

[J-cat]

Loads were too hot AND/(or) not fully in battery when ignited. SOME early glocks had a reputation for this bout 10 or so years ago.

No Glock 9mm ever had a reputation for this.

[the86d]

It wasn't in a M9, or 92FS, for sure.

[twotacocombo]

I find bulged 9mm cases all the time at the range.

Apparently there's been some reports of M&P Shields throwing out bulged brass when fed +P rounds. Also, standard reloading dies can't iron out the last few mm of typical expansion on the tapered 9mm case, so they come out a little hourglass shaped when reloaded. Perfectly harmless, but you can always stuff it through a Lee bulge buster to get rid of it.

[the86d]

Apparently there's been some reports of M&P Shields throwing out bulged brass when fed +P rounds. Also, standard reloading dies can't iron out the last few mm of typical expansion on the tapered 9mm case, so they come out a little hourglass shaped when reloaded. Perfectly harmless, but you can always stuff it through a Lee bulge buster to get rid of it.

I couldn't find a 9mm bulge buster when I last looked.

[J-cat]

Apparently there's been some reports of M&P Shields throwing out bulged brass when fed +P rounds. Also, standard reloading dies can't iron out the last few mm of typical expansion on the tapered 9mm case, so they come out a little hourglass shaped when reloaded. Perfectly harmless, but you can always stuff it through a Lee bulge buster to get rid of it.

The way you fully size a 9mm case is by shaving the top of the shell holder or by using a Lee U die or a combination of the two.

[twotacocombo]

I couldn't find a 9mm bulge buster when I last looked.

There's just one model of bulge buster, which you can attach to the factory crimp die of multiple calibers. For 9mm Luger, you use a 9mm Makarov FCD, as stated on the direction sheet included with the buster.

[357magnum]

Apparently there's been some reports of M&P Shields throwing out bulged brass when fed +P rounds. Also, standard reloading dies can't iron out the last few mm of typical expansion on the tapered 9mm case, so they come out a little hourglass shaped when reloaded. Perfectly harmless, but you can always stuff it through a Lee bulge buster to get rid of it.

I don't think they make a bulge buster for 9mm, because it is a tapered case not straight wall like the .40.

[ptmn]

J-cat's quote is pretty darn eloquent: "It takes a lot of stupid to blow a 9mm case like that."

But I like John Wayne's old quote better: Life is tough...but it's tougher if you're stupid". I have to say, whomever loaded those 9mm rounds has got a very tough life

[Jasonaspears]

Looks like a hot load or weak brass to me. Either way...no bueno

[deac777]

There's just one model of bulge buster, which you can attach to the factory crimp die of multiple calibers. For 9mm Luger, you use a 9mm Makarov FCD, as stated on the direction sheet included with the buster.

^^^ This is what I use. The Lee 9MM Makarov FCD has a slightly larger diameter than the 9mm Luger, but is small enough to remove any bulge.

[Fishslayer]

It takes a lot of stupid to blow a 9mm case like that.

Not really. That little bitty case isn't real forgiving. I've seen .010" change in OAL make a pretty big difference in how it shoots.

My own pet target load is pretty mild in commercial brass and flattens primers in NATO brass.

Now... firing a pistol that is doing that multiple times without noticing...