found this at the range

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floydster

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.40 S&W case, sure would like to know the story behind this:)
 

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Looks like somebody used it for a target.
IE: Shot it with another smaller round down the case mouth.

rc
 
If this cartridge did indeed detonate, it would need to have been in excess of 40,500 PSI. as the SAAMI pressure limit for the .40 S&W is set at 241.32 MPa (35,000 psi), piezo pressure.

In C.I.P. regulated countries every pistol cartridge combo has to be proofed at 130% of this maximum C.I.P. pressure to certify for sale to consumers.

To generate that sort of pressure, the round would most likely need to have not exited the chamber... the owner would have been minus one gun, and likely a few fingers.

If it made it to the brass bucket, I'm sure someone used it as an accuracy test :)

PS If it hadnt been an accuracy test, the results of that shot would have been the talk of the range when you arrived, I'm sure.
 
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To generate that sort of pressure, the round would most likely need to have not exited the chamber... the owner would have been minus one gun, and likely a few fingers.

If it made it to the brass bucket, I'm sure someone used it as an accuracy test :)

PS If it hadnt been an accuracy test, the results of that shot would have been the talk of the range when you arrived, I'm sure.

Or you know.. it could have been reloaded too many times. OR a case head separation form a bad batch of brass (*cough* PMC *cough*). I've watched people have this happen a couple times. No real harm done to the shooter or the gun.

It looks like someone blew out the case with something less than a double charge in a chamber that wasn't fully supported, or the round was slightly out of battery.

Double charges in .40 tend to take out the gun. I haven't seen one where anyone was finding the brass to collect and toss in the brass bucket.
 
My guess is that it got into a .45 ACP barrel and then someone shot a .45 ACP into it.
 
Doesn't look at all like a Glock KAboom.
When that happens the thin case web lets go in one place right at the feed ramp cut.
The head & primer pocket remains intact.

If you notice, the center of the case head in the photo's is folded outward from the primer pocket.
No way that happened with the case flat against a breach face when the firing pin hit it.

I still think somebody shot it with another round to take out the thickest part of the case head and fold all those petals outward like that..

rc
 
I thought the web was gone & that is the side walls that took the shape of the ramp. Hard to guess from where I'm standing but it looks familiar.
 
Maybe it fired out of battery, while only partially in the chamber?

When brass is not properly supported in the chamber, it takes a LOT less than SAAMI/CIP spec pressure to rupture. The brass is merely a gasket to seal the chamber.

Andy
 
back in the mid 90's i had a s&w 411, it fired without the slide being in full battery, the case looked like that. the gun went back to S&W they could not find anything wrong and replaced a few springs. for some reason i always had a flinch with that gun after that.
 
Wonder what would happen if I shoot a .40 out of a .45?
Probably look like that.
No but they look funky. I've found 40S&W & 44Rem that have been fired in the wrong chamber. There is a thread just a few weeks ago that had a 40S&W case pictured.
 
Wonder what would happen if I shoot a .40 out of a .45?
Probably look like that.

Nope! It'd look like THIS!:D
IMG_0313.gif

I found that one on the range last year....kept it for a souvenir. No two years ago...my bench wasn't remodeled when the picture was taken. I'll bet the bullet was a tumbler.;) Must have shot out of battery too....wonder if a hospital trip was included....not a peep out of anyone at the club. Well no, I take that back....no burst at the base.

In the O.P.'s case I'm wondering if some nut placed an empty case open side down over the business end of a .357 mag revolver and shot it into the sky.
 
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I have seen this happen once before. Semi auto, shooter chambered a round, became distracted and set the gun down. He picked up the gun and racked the slide again, but the chambered round apparently failed to eject cleanly before he released the slide. BANG -- sort of. Gun wasn't damaged, but he was shaken I do not remember the make/model of the gun. Shooter went home to calm down. Outdoor range, Abilene, TX. ca. 1979.
 
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