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MegademiC
09-09-17, 19:19
I ran a storm lake conversion in my m&p 40 and it was 100% for over 1000rds, at least half suppressed..
I have a KKM conversion for my g23 and it was 100% until today. It failed to extract 4 cases in 200 rds of federal aluminum cases ammo. I haven't cleaned it in 500 rds or so some suppressed..
Should I just swap out the extractor or should I be looking to address something else?
I plan on cleaning it and trying another 1-200 rds tomorrow, but want it to function dirty.

Fwiw this is going to be a 9mm gun, with 40 in emergencies - if ever.

Thanks.
Clint
09-09-17, 20:04
I'd suspect the rim on the aluminum cases is either undersized or too weak and the extractor slipped over.

The extractor may need to be cleaned or replaced.
MegademiC
09-09-17, 21:35
I'd suspect the rim on the aluminum cases is either undersized or too weak and the extractor slipped over.

The extractor may need to be cleaned or replaced.

Thank, ill try to clean it.
If it happens again I'll inspect the rim. FWIW Ive had no issues with brass yet, so you may be onto something.
dieselkarl
09-10-17, 14:37
I had to install a G19 extractor when I installed a Lone Wolf 9mm conversion barrel in my G23.
The 9mm sized extractor has a tighter radius than the .40 version.
MegademiC
09-10-17, 17:53
Cleaned it and still had issues. I'll buy a G19 extractor. Thanks guys.
grizzman
09-10-17, 18:19
The extractor will be an inexpensive fix. I've only put a few hundred rounds through my Lone Wolf barrel in a Gen 3, but it runs well with the stock extractor.

Does it extract with brass cased ammo?
MegademiC
09-10-17, 21:29
The extractor will be an inexpensive fix. I've only put a few hundred rounds through my Lone Wolf barrel in a Gen 3, but it runs well with the stock extractor.

Does it extract with brass cased ammo?

No issues as of yet, but I'd like as much margin for error as possible.
ST911
09-10-17, 23:07
When the gun stopped, where was the case and how was it oriented?
Is the ejector in your G23 marked 4340 or 1882?
Is the rear of your ejection port 90 deg or 15 deg?
Ser# alphas?

With that info, I can offer more.
grizzman
09-10-17, 23:09
No issues as of yet, but I'd like as much margin for error as possible.

Yep, that makes a lot of sense. I've never used aluminum cased ammo before, but it's entirely possible that I may need some time.
MegademiC
09-11-17, 17:10
When the gun stopped, where was the case and how was it oriented?
Is the ejector in your G23 marked 4340 or 1882?
Is the rear of your ejection port 90 deg or 15 deg?
Ser# alphas?

With that info, I can offer more.

1. Still partially in chamber, but completely loose. Case mouth was towards/in chamber, like halfway.
2. Ejector is 28926.
3. 15 degree cut.
4. No alphas in ser# (edit- if you're asking the letters, XKH)
Thanks.
MegademiC
09-16-17, 08:25
Had another, same ammo.
Notice the difference in the angled part. Fte case vs fed hst.

https://www.dropbox.com/s/rjnxxplsydcetdn/Photo%20Sep%2016%2C%209%2006%2039%20AM.png?raw=1

https://www.dropbox.com/s/6tpvwewbe1ah5v5/Photo%20Sep%2016%2C%209%2023%2010%20AM.png?raw=1
Clint
09-16-17, 09:09
The angled part is clearly closer to the rim.

In the first picture, it looks like a chunk taken out of the rim where the extractor presumably slipped off.

They're also appears to be a mark on the angled part which shows contact from the extractor.

This could be holding the extractor open slightly, preventing a positive grip on the rim.

This may be observable by loading different ammo and carefully observing the interaction of the extractor while chambered.
MegademiC
09-16-17, 10:29
I was thinking the same thing. You can see where the extractor slipped and smeared the rim( hard to see on pic).

I'll play with it and see. Will a 9mm extractor fit better or is it an ammo problem? I'm wondering if the 9mm would be thinner to not contact the angle.

Maybe a stronger spring will help also?
ST911
10-05-17, 14:38
I set up a gen2 G22 with a KKM 9mm conversion barrel in May, and fired 2,292 rounds of 7 different loads to date. I've used pmag 17s almost exclusively. The conversion mostly worked, with a total of 14 malfunctions. They were occasional failures to eject associated with weaker grips and SHO/WHO shooting, and most often occurred on the last round in the magazine or near thereto. During hand cycling of live and dummy rounds, I noted that the round extracted from the chamber would often slip off the extractor and come to rest on top of the empty magazine. This was seen in live fire occasionally, evidenced by the round falling out of mag well when the magazine was ejected. The gun ran best with the standard .40 extractor (90/5) and ejector (1882). When I installed a 9mm extractor (90/0) and ejector (30274) I had four malfunctions in rapid succession with a load previously reliable. Reinstalling .40 parts restored function. This is the best performance I have seen with a 9mm conversion barrel in a .40 Glock. I've retained the gun and barrel for an extra, recreational shooter. For that purpose, they are acceptable, and a 90% solution to keeping a .40 useful.
MegademiC
10-05-17, 19:42
Thanks ST. I swapped the extractor and plunger only. Hand feeding shows more positive control of the case. I just ran 50 flawless rounds(lol) through it last weekend. Looking to run another 200 in a couple weekends.

My m&p ran the 9 fine(100%), hoping to get the same with the glock. We shall see.