Kaboom today

[Ben B.]

I'd guess case failure, the case head separated from the case and dumped hot pressurized gas in the breach area and that blew out the magazine. If the charge weight was 4.5 gr of W231, no way is 9 gr of powder going to fit a 9mm case without spilling everywhere and being VERY noticeable.

ETA: if the round went off out of battery, that could also cause a case head to let go the way OP pic shows.

I had a case head separation happen with an AR once, and it left a perfect brass tube stuck in the chamber. Blew out the mag, mangled my extractor. IIRC, the bolt was otherwise fine.

 

[arakboss]

Just to be clear, the Like was for the detail of the content, not the event. Happy to hear you escaped personal damage and yer still got all yer digits. It's a testament to the R51's strength.

Just to be clear my like was for your like not being for the event

 

[Kruel J]

Just to be clear my like was for your like not being for the event

Just to be clear, my like was for your like for liking his like and not being for the event.

 

[DirectDrive]

I'd guess case failure, the case head separated from the case and dumped hot pressurized gas in the breach area and that blew out the magazine. If the charge weight was 4.5 gr of W231, no way is 9 gr of powder going to fit a 9mm case without spilling everywhere and being VERY noticeable.

ETA: if the round went off out of battery, that could also cause a case head to let go the way OP pic shows.

I had a case head separation happen with an AR once, and it left a perfect brass tube stuck in the chamber. Blew out the mag, mangled my extractor. IIRC, the bolt was otherwise fine.

4.5 gr W231 does not take up much volume.

 

[gmerkt]

Old post. But:

Because this is the first time I've loaded these bullets, a part of my testing included checking the crimp. I found with the first dozen, I could push the bullet back into the case.

Lee makes undersized sizing dies. In different calibers but 9mm Para. for sure. Helps tighten up bullet pull without getting carried away with taper crimp.

I've got a set of Redding steel dies in .45 ACP, I'd swear there is a slight taper built in (you can see it held up to a light) at the mouth that does the same thing. Don't know if their other caliber sets have this kind of sizing die.

 

[aksu747]

Just to be clear, my like was for your like for liking his like and not being for the event.

Just to be clear, my like was for your like for liking his like about the like for not being about the event.

 

[Kruel J]

Just to be clear, my like was for your like for liking his like about the like for not being about the event.

I just threw up in my mouth a little.

 

[Ben B.]

4.5 gr W231 does not take up much volume.

How about 9 grains in a 9mm case? I haven't loaded W231 in many years but with recent powders I've used, it would be all over the shell plate.

 

[jake2far]

As Paul Harvey said, "now for the rest of the story"
Didn't read 5 pages of posts so perhaps this has been stated, sorry if redundant.

An NRA Shooting Sports Journal | Kaboom: The Consequences Of A Blown-Out Case

Avoid case rupture by always inspecting your brass, and discarding any cases that are damaged or defective in any way!

www.ssusa.org

 

[JCKelly]

One may find some number of blown semi-autos on the internet. Whatever the cause it does happen. Only the "polymer" pistols are in pieces.

I like STEEL

 

[DirectDrive]

How about 9 grains in a 9mm case? I haven't loaded W231 in many years but with recent powders I've used, it would be all over the shell plate.

For instance, if I can place 8.5 gr Blue Dot (flaky double base) in a 9mm case, then I should easily be able to put 9 gr W231 (ball powder) into a 9mm case with no spilling on the shell plate.
I'll make you a bet ?

 

[P7M13]

For instance, if I can place 8.5 gr Blue Dot (flaky double base) in a 9mm case, then I should easily be able to put 9 gr W231 (ball powder) into a 9mm case with no spilling on the shell plate.
I'll make you a bet ?

And it has to be shot out of a Hi Point

Didn't read 5 pages of posts so perhaps this has been stated, sorry if redundant.

An NRA Shooting Sports Journal | Kaboom: The Consequences Of A Blown-Out Case

Avoid case rupture by always inspecting your brass, and discarding any cases that are damaged or defective in any way!

www.ssusa.org

Good article, thanks.

Pistol is back in service and hundreds of rounds through it.

 

[P7M13]

My like is for the event and all the other likes liking the like liking a comment and not liking the event.

 

[Bon Sauvage]

 

[Ben B.]

For instance, if I can place 8.5 gr Blue Dot (flaky double base) in a 9mm case, then I should easily be able to put 9 gr W231 (ball powder) into a 9mm case with no spilling on the shell plate.
I'll make you a bet ?

Do it and take a pic, please. I'd do it myself if I had any 231.

 

[2ndtimer]

Do it and take a pic, please. I'd do it myself if I had any 231.

Not sure if you could seat a bullet and maintain COL, but here is what 9.0 gr of W-231 looks like in a Dillon RL-550 Dillon sizing die Winchester 9mm case. I think a double charge would have disassembled even a steel frame gun. I vote for the bullet setback theory.

 

[Ben B.]

Sure as heck, it didn't spill over. I agree that attempting to seat a bullet on that charge would be unlikely to slip by, but I've seen stranger things happen. Thanks for doing the test and the pic.

I'm in favor of the weak brass and/or not fully in battery theory.