[PFrederick]

Glock 35,. 357 barrel and extractor, everything works fine. If I put in a 9mm conversion barrel it racks fine. Add a loaded 9mm magazine, rack and chamber a round, slide will not rack to eject. It appears to be in battery, fire the round, ejects and reloads, will not rack. Removed magazine, replaced with empty, fired round. Everything is fine as long as no round is chambered.

I plan on replacing the extractor anyway, but would that cause the slide to jam or should I be looking at another problem? Other than taking the Armorer's course, I have no experience

 

[JArthurD]

Have you tried a different mag? I’m thinking about a follower issue

 

[Bradley T]

Sometimes a foreign cartridge/extractor can cause things to be so tightly engaged with the barrel and slide that it wont unlock and cycle smoothly. This happens when you start mixing parts from different pistols.
Mixture of apples and oranges allows a wide variety of weird malfunctions.

 

[9x45]

Plunk test your ammo first.

 

[racer88]

This happened with a P80 build of mine. When I loaded HST 147-gr ammo, and I happened to want to UNload the unfired / live round without firing, the slide was STUCK! If I fired it, the slide would cycle and extract the case without a problem.

I figured out the problem causing the slide to be stuck. For reasons yet to be determined (by the barrel maker), the HST 147-gr BULLET was getting stuck in the chamber (more likely the rifling in the barrel). HST 124-gr did not have this issue. FMJ did not have this issue.

I also discovered, upon repeating the problem that I could indeed rack it out if I used a LOT of force (by hand).

I made this infographic to help illustrate the issue.

Take a round and drop it into chamber. It should drop in easily. You should also be able to spin it around. And upon turning the barrel / chamber towards the floor, the round should drop out. If it's not fitting, it will wedge in there and won't drop out.

I painted the bullets with a Sharpie to reveal where they were engaging the rifling of the barrel.

Try the "plunk test" with the same ammo that caused your problem. I bet that's it.

 

[MGGLOCK9]

Very common problem for in my experience with 147 grain 9mm.

Last time it happened (G19X) I put the slide barrel down in a padded vise. Pushed down on the frame. It ejected the chambered round.

Have experienced the same problem with my 9mm Colt Comp Gov.

 

[racer88]

Very common problem for in my experience with 147 grain 9mm.

Last time it happened (G19X) I put the slide barrel down in a padded vise. Pushed down on the frame. It ejected the chambered round.

Have experienced the same problem with my 9mm Colt Comp Gov.

Now that's interesting. I figured it was a problem with the Zaffiri Precision (aftermarket) barrel. But, you're saying it happened with an OEM / Factory Glock, too??

It did not happen in my factory Glock 19 (gen 2). No problems manually extracting the live 147-gr HST from my Glock 19.

Was it Federal HST?

 

[PFrederick]

That makes sense. The ammo is Federal American Eagle 147 gr FMJ....... Aaaand i just checked it. Problem tentatively identified. Thank you! Now that I know better phrasing for the search for I see a lot on the subject.

I'll try some different 147gr ammo and see if it passes. I do see Federal mentioned a lot in discussions of the problem, along with handloading.

 

[MGGLOCK9]

Now that's interesting. I figured it was a problem with the Zaffiri Precision (aftermarket) barrel. But, you're saying it happened with an OEM / Factory Glock, too??

It did not happen in my factory Glock 19 (gen 2). No problems manually extracting the live 147-gr HST from my Glock 19.

Was it Federal HST?

I cannot recall the particular round. But I have never used Federal HST.
It likely was Fiocchi or Federal 147 grain ball.

 

[sciolist]

Rounds should generally enter the chamber with little resistance for 100% function, but they definitely do not need to spin or drop free. Obviously a wider bullet tip can present problems on the feed ramp and in the leade.

I've never had any problems with 147gr HST in OE Glock barrels. I've shot about 400k of 147 and 150gr hand loads from OE Glock barrels with RN and FP bullets and no problems.

 

[Rusty Guns]

When I first got my G-30S, first trip to the range.
I usually load 5 rounds shooting at the range.
I loaded 5, put mag in and racked the slide, Slingshot.
I don't remember why, but I decided to unload.
Dropped the mag, and tried to rack the slide, it would not rack.
New box of WWB, my normal range ammo.
I tried again more aggressive, no luck.
I had an old grip sleeve in my bag and used it for better grip on slide.
Round ejected. My last resort was going to be fire the round.
Tried Plunk test, that round didn't like going into chamber.
The rest of the box no problem. After that round was in and out a few times found high spot on one side. Sandpaper to that side lightly, and round Plunked just fine.
Reloaded mag and shot all fifty rounds, and another 100 rounds.
Marked that down to a single bad round, never another problem.
I have close to 1,000 rounds down range with G-30S no problems, with all kinds of ammo.

 

[DeltaFiveBravo]

Your chamber, specifically the freebore (aka "throat"), is probably out of spec. The only way to verify is with a function gauge, which costs over $200. Or you can have it checked by a gunsmith.

 

[PFrederick]

As a practical matter, it is solved by just not using that combination of pistol and ammo I have other ammo that does fine with weapon, and other weapons that do just fine with that ammo I'm just new enough at this that I was unfamiliar with the problem.

And I really do appreciate all the responses and suggestions. Problem identified, method to screen future borderline ammo cnanges, how to test for future fit issues before and after, variations in bullet shape, barrel anatomy, really educational.

Fred

 

[9x45]

Chambers are to SAAMI specs. If your ammo doesn't plunk test, then change ammo or shorten the OAL.

 

[cciman]

Deleted

We must emphasize that this is an aftermarket conversion barrel. Not the original Glock barrel.

 

[PFrederick]

Deleted

We must emphasize that this is an aftermarket conversion barrel. Not the original Glock barrel.

That is absolutely true. And a mea culpa is due from me.
Looking back, I bought a less expensive no-name 40 barrel since it didn't come with one. And bought a no-name 9mm barrel to make it less expensive to shoot. I should have gotten a Glock .40 barrel and either ignored the 9mm or paid more for a Lone Wolf or KKM barrel.
Penny wise and pound foolish, and old enough to know better.

 

[9x45]

I plan on replacing the extractor anyway, but would that cause the slide to jam or should I be looking at another problem? Other than taking the Armorer's course, I have no experience

Has nothing to do with the extractor. Most Glocks will run fine on conversion barrels without changing the extractor or ejector.

 

[rickfircetz10]

Who ever the ammo advise guy is know wtf he's saying.hes %100 correct and that isn't something you learn in comic books.i guess older types are good for something.now if we could just get the rest of the world to pay attention to us!!#.LOL.but ya he's right.