Weird thing happened with my CZ P-09 while ejecting live round.

[Walt Sherrill]

The obvious next step is to let CZ fix it or, barring that, acknowledge that they can't. Tell them EXACTLY the ammo you are using. That you have one gun that runs the round right suggests that CZ can make a gun that shoots the round in question.

The "plunk" test may not prove anything -- It may well be that everyone involved in this discussion has misdiagnosed the problem, and something else is causing the strange misbehavior.

I get the sense that you have OTHER reasons for wanting OUT of the P-07/P-09... If so, do so. That said, you seem to be giving up pretty easily.

_____

(I've wanted a P-07 for a while -- maybe we can work up a trade? While shipping can be costly, it's often not as costly as trading a new gun in or selling it for a "used" gun price. Contact me by PM if that's an option...)

 

[Orion8472]

Not really giving up. In fact, I am taking it to my gunsmith friend later today to see what he says. After that, I may send it to CZ. I would prefer to keep it.

 

[viking499]

Not really giving up. In fact, I am taking it to my gunsmith friend later today to see what he says. After that, I may send it to CZ. I would prefer to keep it.

Just send it to me, I will take GOOOD care of it........

 

[Orion8472]

As I think of this, . . . since the "plunk test" shows absolutely no binding with the bullet and threads, . . . I can only assume the longer bullets are just hanging it up if they haven't been fired. I can only assume, then, that this wouldn't be an issue if the round fires out of the barrel. It would eject the casing then, I'm sure.

 

[Walt Sherrill]

It will be interesting to see what your gunsmith has to say -- as a longer bullet that ISN'T hitting the rifling (and causing friction) should have no effect on the slide moving to the rear. This one is a real puzzle to me.

Could it be that all of the rounds were NOT consistent in their dimensions?

 

[Fatdaddy]

With the bbl removed, try dropping the round in again. When it seems to have stopped press it in lightly to firmly with your thumb. Then try and remove it, you will probably notice the bullet starting to stick at this point indicating the ogive prematurely contacting the chamber leade. You should not be able to make the bullet stick by applying pressure to the head of the case.

 

[Orion8472]

I did just that. Dropped the round in and pushed with my thumb. Even pushed pretty hard. No resistance or sticking at all. Round falls out on its own.

 

[Fatdaddy]

odd that it doesn't stick when you press it in firmly, almost sounds like the heavier bullet is jumping it's crimp with the force of the slide slamming home...

 

[Orion8472]

Not sure what you mean by "jumping its crimp".

 

[armoredman]

Fatdaddy, that does sound like a possibility...
Orion, are all the ammunition that have stuck from the exact same lot number?
I will have to see if someone has some 147 HST to try in my P-09, and I'll see if the same problem exists.

 

[Orion8472]

armoredman, yes. From the same box, but it also did it with some others. I listed those that did and those that didn't. Post #18.

I'm going to talk to my gunsmith about it because I really don't think it is an issue with "the bolt pushing the bullet into the rifling".

 

[B00ridge]

I doubt CZ themselves will do much as the gun is designed with a shorter chamber than more modern designs.

What can be done if the OP wants to shoot that load is send the gun off to CZCustom. They will ream out the barrel. A lot of competition shooters have this done because they like shooting the heavier bullets.

 

[Orion8472]

That's what my gunsmith wants to do [ream it out], but I'm not sure how it can be that issue if the "plunk test", and pushing it with my thumb hard, will not get it to stick. Maybe the bolt pushes it harder than my thumb can?

 

[Walt Sherrill]

I doubt CZ themselves will do much as the gun is designed with a shorter chamber than more modern designs.

CZ-USA has modified barrels for a large number of owners who contacted them about short-chamber issues.

It's not clear, in this particular case, that a short chamber is the problem... (It seems a logical assumption, but none of the things you'd normally do to identify the problem in a given gun or barrel seem to confirm that assumption.)

 

[Walt Sherrill]

odd that it doesn't stick when you press it in firmly, almost sounds like the heavier bullet is jumping it's crimp with the force of the slide slamming home...

That's a possibility, but not something that you typically see with quality factory ammo. If that DOES happen, however, there should be marks on the nose of the bullet. Orion8472 should LOOK at the rounds, after they're (finally) removed from the gun... If he can't see any marks on the round, we'll have to find another theory -- or wait for the gunsmith's diagnosis.

Orion8472: be sure to take some of the offending ammo with you when you visit the gunsmith.

 

[Fatdaddy]

Not sure what you mean by "jumping its crimp".

The force of the slide slamming a round into battery may be causing the heavier bullet to break free of the crimp tension of the case. Sort of like the way an inertial bullet puller works. Try riding the slide into battery with some of the problem rounds and see if you can make them go into full battery without sticking (Try the sharpie trick when you do....). If they extract fine there doesn't seem to be anything else it could be.

 

[Orion8472]

Actually, I just did the test with a black magic marker, and got the round to stick, but what was more scuffed was the casing. A small scuff right where the casing meets the projectile. Probably about a millimeter by 3 millimeters.

Again, most of my rounds [other manufacturers and bullet weights] aren't sticking.

 

[armoredman]

Do you have calipers? Can you measure how long the brass is in the rounds that stick, and in the ones that don't? Might actually be an issue CZ-USA can fix.

 

[Orion8472]

I don't have calipers, but my gunsmith does. I'll take them next time I go there.

 

[chris in va]

When you have this 'stuck' event, look at the bullet and see if there are any chafe or rub marks on the bullet, mainly around the case mouth.

But anyway, why are you so stuck on the HST? Some guns just don't like certain bullet profiles. Switch to another type if its having issues.

 

[1SOW]

There could be another issue that comes up with the steel 75s. The slide release "NUB that locks the slide back on an empty mag follower, may not be cut to clear the larger 147gr JHP.
In the CZ 75s the nub shown in the pics has to be shortened slightly to clear 147gr and larger bullets. The one on the right is shaped to clear the larger bullets. Hitting/rubbing this areacan affect feed and extraction. I think I saw that the PO9 has a similar system---worth a look-see.



Other than that, the chamber size is what it is. Most SD cartridges will feed and function fine . Gold Dots, Golden Sabre , Hornady XTP and Critical defense, Federal SD ammo and more will run fine.

XDs are also Eastern European pistols with short chambers, designed around Nato/Round nose cartridges. This also contributes to the CZ's good accuracy for a service pistol. The chamber can be reamed a skosh by any competent smith for little cost or time to do. My recommendation is to use other ammo.
YMMV.

 

[frankenstein406]

Is the rim of the case flush with the hood?

 

[Orion8472]

chris, check out post #42.

1SOW, I will look at that as a possibility, thanks for the suggestion!

frankenstein, the plunk test shows the rim of the case dropping to the same depth as with a 115gr FMJ round. They all will be flush.

As it is, guys, . . . last night I just decided to run my 124gr Golden Sabers in it [they all run with no issues]. I'll keep the HST rounds for my carry gun [Shield].

 

[jon_in_wv]

I had a similar problem with some loads I reloaded. The rounds would feed and fire just fine from my M&P 9C but they would stick just like you describe in my fullsized M&P. The compact had about 10,000 rounds through it so I would bet the rifling/chamber are a little looser than the fullsize. I used the rounds in my compact then switched to different bullets after that. Us the marker trick on the bullet. You will probably be able to see where the rifling is contacting the bullet.

 

[Orion8472]

I think I will just leave it as it is and use a brand that will operate well in this gun. It's fine otherwise.

Thanks for the insights and comments, guys.