Oops. 9x19 fired in a 357 SIG

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atblis

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I learned a few things today. Apparently 9x19 will feed, chamber, fire, and cycle when fed out of a Glock 17 magazine in a Glock 20 with a 357 SIG barrel. :eek:

Not sure what the pressures actual were, but consider for a second that the case head was completely unsupported, and that velocity/pressure was sufficient to cycle a GLock20 with a 22 lb recoil spring (barely though). Hmmm.

How this happened...I was trying to chrono 357 SIG ammo, but the chronograph wasn't working. I had a limited amount of the 357 SIG, so I loaded up a mag of 9x19 to use to trouble shoot the chronograph. Grabbed the wrong gun. :banghead:

9in357.jpg
 
:eek:
Looks like you fireformed the case backwards Fat part should be at the bottom. :p

I had someone fire a 9mm in a .40 Glock next to me at the range one day.
The case was all torn up and came out in pieces.

Just curious, since you seem to have fired more than one did you notice anything differentt feel wise?
 
Yes. I thought at the time that the recoil was very mild, but attributed that to having been firing some rather hot 357 SIG immediately before.

9x19 cases are very strong. Clark has commented on this IIRC.
 
You're not the first, and certainly won't be the last. The "normal" mix-up with 357 Sig is firing them in a .40 S&W chamber.

Fred
 
I've seen .40 S&W fired in a .45ACP 1911. Bulged case but no other major issues. Wouldn't want to do it intentionally, as YMMV.
 
I once picked up a G-19 mag and inserted it in my G23. The round fired,but did not cycle the action. I realized my error after the 1st shot when I manually ejected the spent casing.
 
I've picked up the occasional piece of range brass that had obviously been fired through the incorrect barrel.
Never picked up 5-6-7 of them, though.

Attention to detail is apparently not your strong suit.
Hope you are not a handloader...
 
This is posted in the handloading and reloading forum. Attention to detail is apparently not your strong suit. Hope you're not a handloader as well...
 
How was the accuracy?

Atblis & orionengnr, you never made a mistake in life? Ease up.
 
atblis said:
How this happened...I was trying to chrono 357 SIG ammo, but the chronograph wasn't working. I had a limited amount of the 357 SIG, so I loaded up a mag of 9x19 to use to trouble shoot the chronograph. Grabbed the wrong gun. :banghead:
Click to expand...

I'll ask the obvious question. . . how did the chony?:neener:
 
Looking at your 357sig round, what RN bullet are you using and at what COL?

I have steered away from RN bullets for 357sig, but maybe Glock's are different.
 
My spies tell me that .380 ammo will fire in a Glock 43 9mm, and sometimes cycle the gun.

Apparently, extractor + inertia hold the round in place enough for the firing pin to detonate the primer.

Don't want to try it myself.
 
Aaand, just for the curious, yes, a .41 mag will fire from a .44 revolver. And hit paper, pretty close to point of aim for the ammo the gun is meant for. Ruins the brass, though. These are the harmless errors that hopefully teach us to be more careful before a big screw-up costs a finger or worse.
 
I shot 3- 270 winchester rounds in my old 30-06 Browning A bolt before figuring it out. When that last one went through my target sideways I started looking for a bent barrel! Someone put a box of 270 on the stack of 30-06 and I grabbed them. It would be a deadly short range rifle! Accuracy suffered great losses though!
 
Did not get a reading. The chrono refuse to work that day (rainy). Might try again wearing welding gloves. Eeek.

Looking at your 357sig round, what RN bullet are you using and at what COL?

I have steered away from RN bullets for 357sig, but maybe Glock's are different.
Click to expand...
Those are standard 115 gr FMJ one would typically use in a 9x19. Normally these are a no go in a 357 SIG because if you load to a length that fits in the magazine (1.15" ish), the case neck does not grip the flat part of the bullet . However, when fired from a 45/10mm length gun, in this case a Glock 20 with a LW barrel, you can load longer. 1.285" fits in the magazine and feeds. This also gives you more room for powder. Problem is, you won't find data with pressures. So....what does one do? AA9 seems to run out of case capacity before maxing out in pressure when used in a 357 SIG. AA9 would perhaps benefit from an extended OAL. With a 4.5" barrel, I am seeing 1700 fps using Longshot. Primers look good.

Here is another thread with 357 SIG stuff
http://www.thehighroad.org/showthread.php?t=790584&highlight=primer+check

Got some of the RMR 90 gr HPs to try next.
 
Last edited:
Yep, seen that one before.

Most interesting cases I have seen were .264 win mag fired from a 300 Weatherby.

Most destructive I have seen is 300 blk in a .223 AR15, that one makes a mess.

It is quite common as are squib/kaboom threads. Only takes a few seconds of inattention or complacency.
 
How's the gun? Did you check it for damage?

What about the chamber? I can't imagine it was good for any part of your firearm, even if .357 SIG shoots 9mm bullets.
 
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