Glock G34 ejecting case straight back

AR10ShooterinNC

AR10ShooterinNC

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I have a G34 gen3, milled for a DPP. After adding the DPP most of the empties are ejecting straight back and hitting the DPP, leaving powder residue on glass. I'm using handloads, 5.0 grs CFE Pistol, 124gr Blue Bullet, mixed brass, average velocity is 1050 fps. How do I fix this?
Jt4hnno.jpg
 
AR10ShooterinNC said:
I have a G34 gen3, milled for a DPP. After adding the DPP most of the empties are ejecting straight back and hitting the DPP, leaving powder residue on glass. I'm using handloads, 5.0 grs CFE Pistol, 124gr Blue Bullet, mixed brass, average velocity is 1050 fps. How do I fix this?
Jt4hnno.jpg
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Does it only do it with the reloads? Or does factory ammo do the same?


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Normally I would have suggested an anemic load causing the issue, but your recipe seems OK.

Your issue sounds similar to the brass-to-face phenomenon. Perhaps a different recoil spring? I've heard that folks have used the Apex extractor/spring as a remedy too, but they're not cheap.
 
nbkky71 said:
Normally I would have suggested an anemic load causing the issue, but your recipe seems OK.

Your issue sounds similar to the brass-to-face phenomenon. Perhaps a different recoil spring? I've heard that folks have used the Apex extractor/spring as a remedy too, but they're not cheap.
Click to expand...

That’s kinda what I was thinking too. Might have changed the slide speed to just the right speed for it to be ejecting like that when he added the dpp.


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G34 Gen4, I bought as is, except the DPP. It has an aftermarket 3.3# trigger.
Rounds are 124g RMR, CCI 500 & 5g CFE Pistol.
1)- I just discovered why some brass is landing to my right, and some is landing directly in front of me. Some of the brass is beating the crap out of my new DPP sight :(
1E2F34B6-0913-46B3-BE73-FE08F0CD6383.jpeg
I don’t know what the recoil spring poundage is, these are the only markings I
can find.

143A806F-541A-4F16-84BD-75A053A6FB50.jpeg
2)- There’s a build up of grime and unburned powder build up. After 20+ years of handloading 40 S&W Glocks I’ve never seen unburned powder & this much grime after a couple hundred rounds in a Glock.
44468184-7285-458F-8D51-91FADDFF04B2.jpeg

What are your thoughts?
 
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That is the correct current recoil springs for a Gen 4 G17/34. For a Glock 9mm Extractor clearance will be 1.27mm for Go and 1.80mm for No Go.
IMG_9011.jpg


Check for broken or damaged ejector-Replace trigger mechanism housing with ejector. 9m should have 336 engraved on it.
IMG_9012.jpg

CD
 
Combat Diver said:
That is the correct current recoil springs for a Gen 4 G17/34. For a Glock 9mm Extractor clearance will be 1.27mm for Go and 1.80mm for No Go.
View attachment 161836

Check for broken or damaged ejector-Replace trigger mechanism housing with ejector. 9m should have 336 engraved on it.
View attachment 161837
CD
Click to expand...
Thank You!!!! Especially for including the gauge thickness!
G00gleFu found a couple threads with the same issue.
https://forums.brianenos.com/topic/276542-do-glocks-ejection-pattern-beat-up-rds/
and
https://primaryandsecondary.com/forum/index.php?threads/g34-ejecting-case-straight-back.6477/
 
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Seems to be kinda common with the 34.
I have two 17s with dots and zero brass strikes. 11 or 13 lb recoil springs. I also have a very solid grip not that anyone ever admits to anything else. The Apex extractor seems mixed with as many claiming nothing changed as claim success.

CFE pistol is mid range/slow isn't it? May need more for a full burn. I use fast powders in nine, get carbon but very few flakes. I've had piles of unburned in various 45 loads, ugly, but no malfunctions from it.
 
Beef15 said:
Seems to be kinda common with the 34.
I have two 17s with dots and zero brass strikes. 11 or 13 lb recoil springs. I also have a very solid grip not that anyone ever admits to anything else. The Apex extractor seems mixed with as many claiming nothing changed as claim success.

CFE pistol is mid range/slow isn't it? May need more for a full burn. I use fast powders in nine, get carbon but very few flakes. I've had piles of unburned in various 45 loads, ugly, but no malfunctions from it.
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What powder & load are you using?
 
Currently 3.4gr of Clean Shot under a 147gr RN Blue Bullet. Frequently 3.6gr with a 133gr RN Hi-Tek coated.

I think I was using 4.2gr under a 124gr RN FMJ by RMR.

Have used Titegroup, Bullseye, and Clay Dot at similar velocities at least with the coated bullets, don't load many copper clad.
 
Hodgdon's response:
"The load looks to be within our spec. CFE pistol can be a bit dirty at lower pressure or starting loads, should not be the case with 5.0 gr. My first thought is crimp. Having a good deep crimp helps with powder ignition and cleaner burn."
 
It almost looks like a cartridge came apart in your gun. Or maybe you lost a primer and the powder leaked out?
 
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Pink_Vapor said:
That’s odd, I’ve the same setup (gen 4), 124g with 5g CFE and they’re landing directly 2’ in front of me.
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I thought I read a thread where folks found a 'best' COAL that increased accuracy and decreased Ex Spread. Any thoughts?
 
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Mine (gen 4) started whacking me in the head with brass. Replaced the OEM extractor spring with a new OEM one and that cured it. 2nd time I've had to replace that spring in 25k rounds. It's some clever engineering they've got going on there... when it's time to replace the springs the gun hits you in the head a few times in place of having a "check springs" light come on.
 
Jayne said:
Mine (gen 4) started whacking me in the head with brass. Replaced the OEM extractor spring with a new OEM one and that cured it. 2nd time I've had to replace that spring in 25k rounds. It's some clever engineering they've got going on there... when it's time to replace the springs the gun hits you in the head a few times in place of having a "check springs" light come on.
Click to expand...
I ordered a new spring today, hopefully that’s the fix!
 
Combat Diver said:
That is the correct current recoil springs for a Gen 4 G17/34. For a Glock 9mm Extractor clearance will be 1.27mm for Go and 1.80mm for No Go.
CD
Click to expand...
If my math's correct, that's 0.050" go & 0.070" no-go, mine measures 0.060".
I shortened the COAL by ~ 0.015" to 1.115", shot two mags with no DPP impacts o_O Maybe that was the fix, or I needed to run another mag.
I also ran 2 mags with 5.2g of CFE, still no DPP impacts, avg bullet speed 1140 fps. Do all of the primers, except the upper rt 2, look on the hot side to you? Those are CCI primers.
Per @Jayne suggestion i replaced the extractor spring as well. Out of curiosity I ordered a tool @Combat Diver mentioned in another post to check striker engagement, the orange 1/2 inspection plate.
I'll report back after a few hundred rounds have been through it.
IMG_0183.jpg IMG_0179.jpg IMG_0185.jpg
 
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With all those changes we won't know what actually fixed it and who will get the points for having the right answer!
 
Jayne said:
With all those changes we won't know what actually fixed it and who will get the points for having the right answer!
Click to expand...
I set the rounds back then shot 2 mags
Upped the load 0.2 and shot 2 mags
Replaced the spring and haven't shot it yet.
With Hodgdon's response, "The load looks to be within our spec. CFE pistol can be a bit dirty at lower pressure or starting loads, should not be the case with 5.0 gr. My first thought is crimp. Having a good deep crimp helps with powder ignition and cleaner burn." maybe shortening the COAL a bit made a difference.
 
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