cartridge snug fit in barrel

[Matthew Rauh]

New shooter and proud owner of a P 01 omega.  Just got my first 500 rounds in,

I have had a FTF/Jam issue.  The gun would cycle after firing but then it wouldn't fire.  The slide would seem to be in battery, but stuck; can't rack it without considerable force pulling it back. This happened three times while using two boxes of Fiocchi 115 gr. FMJ ammo.  I did not have this problem with Federal, Winchester or Remington.

Out of curiosity, I disassembled the P01 and dropped a cartridge in the breech of the exposed barrel.  The Fiocchi plunked in place, but would stick.  If I turned the barrel upside down, it would not fall out.  Not hard to pry out with my fingers.  The Federal and Remington cartridges plunked in place and remained loose.

I am new to shooting, so I am not sure how tight a cartridge should fit in the breech, but this doesn't seem right to me and I am afraid to use Fiocchi anymore.  This occurred with two separate boxes.

Thanks for the help.

[Wobbly]

FIRST
Welcome Aboard from GA.

Please take a few moments to familiarize yourself with the sticky posts in the 'New Members' Forum and also the 'Important Information' sub-section.

SECOND
This issue is very common and beginning to show up more frequently. Our Stickies have a complete guide to handloading issues and another whole section on issues with factory ammo.

You'll want to read this: https://czfirearms.us/index.php?topic=120538.0

You didn't say what type ammo gave you issues, but the problem is the same: Ammo that is out of spec in its physical proportions being chambered in the Luger's tapered chamber.

We have had complaints with both SIG and Fiocchi within the last 2 months. Can you please tell us more ?

Read that and then we can discuss further...

[PA USPSA]

When doing the plunk test the cartridges should be able to freely rotate and drop freely when the barrel is held upside down.  I would no longer use Fiocchi.  Blazer Brass has worked well in my Accushadow 2.  You can try that as well.

[Matthew Rauh]

Thanks for responding. It is the Fiocchi 115gr Range FMJ. Got them on sale.

[Wobbly]

We're not making this up....

https://czfirearms.us/index.php?topic=119349.0

[Matthew Rauh]

And thanks for the welcome. There is a lot of useful information here.

[Matthew Rauh]

Thanks for the articles. That settles it. Got four boxes of Fiocchi I will return or sell at a discount. Picked up a box of Blazers tonight to see if they chamber well. Again no issue with Federal, Winchester or Remington. Glad I joined.

[Wobbly]

Thanks for the articles. That settles it. Got four boxes of Fiocchi I will return or sell at a discount. Picked up a box of Blazers tonight to see if they chamber well. Again no issue with Federal, Winchester or Remington. Glad I joined.

You can't return ammo. I would suggest....

1) Do the ink marker thing and twirling the cartridge in the chamber with light pressure to check where the interference is. It could be a small burr or some such on 3 or 4 rounds out of 50 that can easily be removed with a pocket knife.

2) There is a high likelihood of this ammo being OK in a Ruger or early gen Glock... something with a more generous chamber.

[Matthew Rauh]

Thanks for the advice. Will give it a try.

[Matthew Rauh]

Quick update in case anyone is following.  Took my two remaining boxes of Fiocchi and each round failed to plink.  Visibly stood out of the chamber.  I feel bad that I had fired two boxes before noticing this.  Don't see to have damaged the gun since other rounds from other brands worked well.  I think I might take my barrel whenever I decide to purchase untested brands.

Glad I joined the forum; very helpful.

[Wobbly]

Quick update in case anyone is following. 

You have 400 readers following this thread.

Took my two remaining boxes of Fiocchi and each round failed to plink.  Visibly stood out of the chamber.  I feel bad that I had fired two boxes before noticing this.  Don't see to have damaged the gun since other rounds from other brands worked well.  I think I might take my barrel whenever I decide to purchase untested brands.

Glad I joined the forum; very helpful.

We're glad you joined in too. Please take the time to cover a sample cartridge with a Sharpie marker, then lightly twist that cartridge in the chamber. It would be interesting to know exactly what part of the Fiocchi cartridge is causing the issue.

All the best.

[bonj]

New shooter and proud owner of a P 01 omega.  Just got my first 500 rounds in,

I have had a FTF/Jam issue.  The gun would cycle after firing but then it wouldn't fire.  The slide would seem to be in battery, but stuck; can't rack it without considerable force pulling it back. This happened three times while using two boxes of Fiocchi 115 gr. FMJ ammo.  I did not have this problem with Federal, Winchester or Remington.

Out of curiosity, I disassembled the P01 and dropped a cartridge in the breech of the exposed barrel.  The Fiocchi plunked in place, but would stick.  If I turned the barrel upside down, it would not fall out.  Not hard to pry out with my fingers.  The Federal and Remington cartridges plunked in place and remained loose.

I am new to shooting, so I am not sure how tight a cartridge should fit in the breech, but this doesn't seem right to me and I am afraid to use Fiocchi anymore.  This occurred with two separate boxes.

Thanks for the help.

Return your gun to CZ for a free warranty repair, where they will lengthen the barrel throat and you will no longer have any issues with any brand of ammo. They will send you a free Fedex return label as well.

[Wobbly]

Return your gun to CZ for a free warranty repair, where they will lengthen the barrel throat and you will no longer have any issues with any brand of ammo. They will send you a free Fedex return label as well.

Exactly what would this option do ?

The OP has already conclusively proven that the issue lies in the ammo. How will permanently loosening the chamber tolerances help with this temporary ammo issue ?

Lots of options are FREE, but that doesn't make them Wise. IMHO, this would not be a moderate, well-reasoned, or even a sensible response.

[Phyffe]

I have had a FTF/Jam issue.  The gun would cycle after firing but then it wouldn't fire.  The slide would seem to be in battery, but stuck; can't rack it without considerable force pulling it back. This happened three times while using two boxes of Fiocchi 115 gr. FMJ ammo.  I did not have this problem with Federal, Winchester or Remington.

Had the exact same issue using Armscor 124gr FMJ on my P10S, and only that brand, more upscale brands worked fine. After about 200 rounds, the barrel became more forgiving, less FTFs. Still, I bought an ammo gauge  so I wouldn't have to disassemble my P10 every time I got a new box of ammo.

Yes, I gauge every single box of ammo I buy now. In practice, the ammo gauge seems a little more exacting than my barrel, so that's good.

I just bought a box of SIG 124gr FMJs. I'm happy to say all the rounds passed the ammo gauge.

A recommendation was made earlier for Blaser Brass ammo. I second that recommendation. Best quality ammo for the money I have found.

I've got some Fiocchi ammo, Black Mambas and their EMB ammo. Thankfully, they gauged/plunked well.

Hope you enjoy your P01

[Matthew Rauh]

Didn't mean to cause such a stir.  400 followers?

I am very pleased I joined the forum.  I received nothing but helpful advice.  I am convinced you saved me from damaging my gun.

I did the sharpie test.  If I can figure it out, I will send a picture.

I did think of sending it in to CZ so I don't have to worry about it again.  But I am hesitant to do that.  Not sure why.

The blazers fit perfectly.

As far as the Fiocchi is concerned, I will trade with someone else or hang on to them.  I may purchase a second handgun in the Spring because my youngest son is interested in shooting.  From what I gathered on other posts, it sounds as though other manufacturers have more liberal space in the barrel (sorry, don't know all the technical terms).  The Fiocchi was and is on sale at Scheel's for $14.99 a box.  That is why I bought several boxes.

Quick question.  Does the bullet grain also play into this?  I have been shooting only 115 grain (breaking in as suggested elsewhere in the forum).  I am tempted to bump up to 124 grain.  Will that increase the chance of the problem?