M&P Shield .40 Blow Up

[M&PmikeC]

and what other rounds of ammo are available for the 40 other then 40 s&w ive shot federal, Winchester, pmi, and glazer ammo thru my gun THEY ARE ALL STAMPED 40 S&W I don't understand

 

[Roger S&W]

And the Ammo manufactures say there's nothing wrong with their ammo. Someone's not being straight. I say these KABOOMS are from a poorly supported chamber and S&W doesn't want to own up to it. Consult an attorney.

Why consult an attorney and pay out the posterior orifice when you can simply drop a live round in your barrel (removed from the gun) and inspect with a bright light for chamber support. My Shield 40 has like .2mm unsupported casing support. To me, with factory ammo, that is acceptable.

 

[Hillbilly77]

what is the Battery part of the gun you speak of

"In battery" means that a round is chambered and the slide is all the way forward, the gun is ready to fire.

and what other rounds of ammo are available for the 40 other then 40 s&w ive shot federal, Winchester, pmi, and glazer ammo thru my gun THEY ARE ALL STAMPED 40 S&W I don't understand

It's all .40S&W.

.40S&W is the cartridge.

 

[Roger S&W]

what is the Battery part of the gun you speak of

If you're going to own a gun , you better look up some basic terms.
Out of battery means the slide doesn't come all the back completely to properly fire the next round.
What other chambering is there for .40S&W? huh?
.40S&W is the caliber. It comes in three different weights, 155gr, 165 gr., and 180 gr.
That's it. There's only one .40 caliber ammo though. It is designated .40S&W because S&W developed the cartridge in the late 1980's.

Dam, the Hillbilly just beat me to it. And I thought I was gonna be teacher for tonight!

 

[flat_topp]

Winchester Head Stamps

I have three different examples of Winchester 40S&W factory ammo in my collection. All purchased within the last 16 months. The value pack on the left is stamped "WIN". The Ranger in the middle and JHP on the right are both stamped "WINCHESTER".

 

[peterthefish]

I have three different examples of Winchester 40S&W factory ammo in my collection. All purchased within the last 16 months. The value pack on the left is stamped "WIN". The Ranger in the middle and JHP on the right are both stamped "WINCHESTER".

Good point - OP - how about a pic of the ammo box and lot #. Help out your fellow shooters watch out for some potentially bad ammo.

 

[Matt Butner]

I wish I had the box but I threw it away the day we were shooting and all the ammo was shot. There were 4 of us shooting that day. I shot the rest of the ammo in my buddies competition glock. I do remember shooting most of the ammo before this happened though. I wish that I still had the box as I am sure it would help.

 

[uechikid]

Why consult an attorney and pay out the posterior orifice when you can simply drop a live round in your barrel (removed from the gun) and inspect with a bright light for chamber support. My Shield 40 has like .2mm unsupported casing support. To me, with factory ammo, that is acceptable.

I have yet to hear about any FS M&P40s using main stream ammo having this problem. There is an issue with the 40 Shield that S&W doesn't want to own up to.

 

[peterthefish]

I have yet to hear about any FS M&P40s using main stream ammo having this problem. There is an issue with the 40 Shield that S&W doesn't want to own up to.

I have yet to hear of a Shield KB involving Factory SAAMI spec ammo - seems like its up to the task it's designed for to me.

There is no more an issue here than there is with the Colt Delta Elite or FNP-45. Not all guns have complete chamber support. The fact that a gun can't handle over-spec ammo that is fine in firearms with full chamber support doesn't mean the gun is at fault. It means someone (the loader / shooter) is assuming that because a round / load works fine in one gun it will work fine in another.

It's like dropping a turbo in your car and then complain to the manufacturer when the engine blows because other cars use turbos without a problem.

 

[RobsTV]

I've been wondering that about all of these kabooms.

The Shield 40 can not fire out of battery in dozens of out of battery tests I have performed.

I reload as long and fat as I can get away with. Used a throating reamer to remove the sharp rifling edge to allow lead bullets to be seated further out. Occasionally I will make things too long or fat on the bench and not take into account buildup in chamber that can occur after firing a few rounds. This causes the too long or fat reloads to not fully chamber during firing tests, as the slide is back a few thousands. Primers are spotless, not a light strike, etc. To finish off the rounds, I manually force the slide forward with my thumbs the remaining amount it needs to chamber the rounds. Then it goes bang.

 

[uechikid]

I have yet to hear of a Shield KB involving Factory SAAMI spec ammo - seems like its up to the task it's designed for to me.

OP states he was using Winchester white box. Sounds like Factory SAAMI spec ammo to me.

 

[Roger S&W]

I have yet to hear about any FS M&P40s using main stream ammo having this problem. There is an issue with the 40 Shield that S&W doesn't want to own up to.

Well, my 40FS and 40c both appear to have 100% full chamber support. It's my Shield 40 that has a miniscule .2mm of gap. Is that enough to cause a KaBoom?

 

[Roger S&W]

OP states he was using Winchester white box. Sounds like Factory SAAMI spec ammo to me.

Go back and re-read please. The OP stated one of his friends was shooting reloads and there is a possibility he could have fired some through his Shield 40. He doesn't think so though.
I think this is what inadvertently happened.
Just like when you're dry firing or cleaning your gun, you shouldn't have any ammo in the room....well, same theory applies here.
If you don't want to shoot hot reloads through your Shield 40, then don't shoot and accidentally share/confuse ammo with all your friends around you at the range. BECAUSE SHEET HAPPENS.

 

[CAJUNLAWYER]

Speak to an attorney before you send it back a second time. You should be able to get a consultation for a reasonable fee. So far I have yet to see S&W do the right thing where the Shield blow ups are concerned.

Make sure you tell him the "possibility" of you using a reload. I think that is where you loose. Burden is on you not Smith to prove it isn't ammo related. By your own admission you may very well have been using reloads.
Sorry-but as a lawyer and after reading this thread that's how I see it.

 

[CAJUNLAWYER]

Why consult an attorney and pay out the posterior orifice when you can simply drop a live round in your barrel (removed from the gun) and inspect with a bright light for chamber support. My Shield 40 has like .2mm unsupported casing support. To me, with factory ammo, that is acceptable.

Hold on there scooter-we got to eat too

 

[Rastoff]

Hold on there scooter-we got to eat too

Lawyers eat? And here I thought they just kind of filter fed off the bottom of the pond.

 

[uechikid]

Go back and re-read please. The OP stated one of his friends was shooting reloads and there is a possibility he could have fired some through his Shield 40. He doesn't think so though.
I think this is what inadvertently happened.
Just like when you're dry firing or cleaning your gun, you shouldn't have any ammo in the room....well, same theory applies here.
If you don't want to shoot hot reloads through your Shield 40, then don't shoot and accidentally share/confuse ammo with all your friends around you at the range. BECAUSE SHEET HAPPENS.

Well, the case that the OP posted a picture of that blew up is a Winchester, the factory ammo he was shooting was Winchester. Coincidence?

 

[Hillbilly77]

I've been wondering that about all of these kabooms.

The Shield 40 can not fire out of battery in dozens of out of battery tests I have performed.

I only wondered because I know my 9MM Shield will release the striker if the slide isn't all the way forward. It will release the striker if the slide is about 1/8" back. I admit it don't know at what point the striker will hit the primer, but will release the striker.

I have tried this several times while dry firing, and it happens every time.
My thought was that if the slide wasn't all the way forward, could the firing pin hit the primer hard enough to ignite?
It seems like a recipe for a kaboom if it ignited the primer without the slide locked in battery.

Like I said, I have mimicked the test several times while dry firing. I'm not foolish enough to try it loaded.

 

[peterthefish]

I only wondered because I know my 9MM Shield will release the striker if the slide isn't all the way forward. It will release the striker if the slide is about 1/8" back. I admit it don't know at what point the striker will hit the primer, but will release the striker.



I have tried this several times while dry firing, and it happens every time.

My thought was that if the slide wasn't all the way forward, could the firing pin hit the primer hard enough to ignite?

It seems like a recipe for a kaboom if it ignited the primer without the slide locked in battery.



Like I said, I have mimicked the test several times while dry firing. I'm not foolish enough to try it loaded.

Try putting a pencil, eraser end first, in the barrel and try it. No move no hit, easy peasy.

 

[peterthefish]

Well, the case that the OP posted a picture of that blew up is a Winchester, the factory ammo he was shooting was Winchester. Coincidence?

Winchester and Federal probably make up 90% of range pickup brass. Winchester probably makes up half of my .45 and 9mm brass collection. So not really an unlikely coincidence.