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You can't make this stuff up...


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#1 reconbob

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Posted 22 June 2020 - 10:35 PM

Doing an M1 gun build. Standard routine. Test fire, then disassemble and
blue, and reassemble and final test fire. My guy forgets to put the extractor on
the bolt. Gun fires, and we think all is ok except doesn't eject. Put extractor on
bolt. Test fire and now gun does not fire and cartridges almost chamber but not
fully.
Turns out the cartridge case from the first round blew back enough to clear
the chamber and must have hit the ejector and flipped around and the bolt shoved
it fully into the chamber with the bottom of the case first. So the following rounds
had the bullet shoved into the mouth of the empty case which was now acting as
a chamber.
Easy fix once we realized what happened, but who would have thought...

Bob
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#2 jim c 351

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Posted 23 June 2020 - 06:52 AM

Bob,

I guess you were lucky you weren't  using an M1A1 bolt or the cartridge may have fired out of battery.

Jim C


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#3 TSMGguy

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Posted 23 June 2020 - 08:54 AM

If it can happen, it will. Murphy's law in action! I'll bet you never saw this particular failure before, and never see it again.


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#4 ppgcowboy

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Posted 23 June 2020 - 09:02 AM

Thunk would be more appropriate. Who would have thunk. I bet you can never repeat that. Definitely a head scratcher.
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#5 Paladin601

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Posted 23 June 2020 - 04:55 PM

A lot of strange stuff happening now. It is that month of the Galactic years for strange things.


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#6 MG08

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Posted 25 June 2020 - 03:14 PM

Good story - learn from others problems or suffer for making them again. Thanks for sharing - Not one I would have thought of, but I have seen a lot of weird ejection issues in all sorts of guns.


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#7 Black River Militaria CII

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Posted 25 June 2020 - 03:18 PM

MG34s know that trick!


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#8 imageaudio

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Posted 27 June 2020 - 12:53 AM

Strange but true stories.    A couple of years back, I had a very similar issue in 9mm.   Half the case separated after ignition leaving behind 1/2 the case in the chamber.  Took a while to figure it out but eventually realized what the problem was and thought, "boy, that's one in a million" .  .  .  .  . until it happened again a couple of weeks later.     Then it happened to a friend.   In fact, it occurred often enough amongst my group of shooting friends that we began referring to it at the range as " a Ringer".      What in the world could be going on???

 

Just for fun, I'll post some pics today to show you what the case looked like after separation.    The bottom of the case was extracted (and often lost in the grass on the range) but the top half of the case was left behind in the chamber.   

 

Anyone interested to venture a guess what was the cause of this mysterious range phenomenon?    We eventually figured it out after applying the secret to almost any gun related issue, and that is attention to detail.   

 

I'll post the solution in a few days if someone doesn't guess it first.

 

Have fun solving the mystery!

 

   

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#9 StrangeRanger

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Posted 27 June 2020 - 07:36 AM

The right hand picture shows the problem.  Rather than a smooth taper, the case has a step located at a very high stress point and that is exactly where the separation occurs.  It's a known issue with certain brands. Let me guess either FM or Maxxtech crap ammo?

 

http://www.uzitalk.c...h&daysprune=100


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#10 imageaudio

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Posted 27 June 2020 - 08:50 AM

Yes, the stepped case was exactly the problem. We did encounter some FM headstamps since our range is located outside of Houston where Freedom Munitions had a retail store. The other headstamp we encountered was Ammoload.

Since I now know all ammo is not created equal, I do not run any remanufactured ammo through my sub guns.

I am wondering what factory ammo other board members prefer to use in their FA firearms? Both 9 and 45?
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#11 imageaudio

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Posted 27 June 2020 - 09:01 AM

Here is a photo of an intact case which is what us reloaders need to diligently cull from our brass supply.

Thanks StrangeRanger for the link to the Uzitalk forum where this photo was obtained.

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#12 StrangeRanger

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Posted 27 June 2020 - 09:34 AM

Blazer Brass, Speer Lawman, Federal Black Box, Sellier & Bellot all no issues

No problems with WW White Box but I've not run nearly enough of it to be certain

Heard nothing but good about Prvi Partizan but I've not tried it personally

Remington is often underpowered enough to cause failures to eject and EXTREMELY dirty.  The bargain price just isn't worth the hassles.


Edited by StrangeRanger, 27 June 2020 - 09:35 AM.

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#13 2ndArmored

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Posted 27 June 2020 - 12:24 PM

Sellier & Bellot gives great results (both function & accuracy) in my M-16/CAR-9.  Blazer aluminum works flawlessly except in very dirty guns.  (For which I place the blame on me, not the product.)  I use the aluminum version because I don't have the need nor the room for any more brass (yeah I know - blasphemy) and the kids get to recycle the aluminum.


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#14 imageaudio

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Posted 27 June 2020 - 11:48 PM

Are you all running 115s in 9mm and 230 in 45?
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#15 StrangeRanger

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Posted 28 June 2020 - 08:25 AM

yes to both


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#16 2ndArmored

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Posted 28 June 2020 - 09:51 AM

Always 230gr in .45, occasionally 124gr in S&B 9mm.  (Blazer aluminum doesn't offer the mid-weight bullet.  They have only 115gr and 147gr ammo.)


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