CZ ammo issue

[bonj]

Ditto. I have had no further issues after the factory lengthened the chamber throat to allow the fitting of larger than standard ogive ammunition.

[Wobbly]

Ditto. I have had no further issues after the factory lengthened the chamber throat to allow the fitting of larger than standard ogive ammunition.

That's part of the issue here... there is no such thing as "standard ogive ammunition".
• Every bullet offered for sale cannot be loaded into every barrel made.
Thus it stands to reason...
• Every ammo offered for sale cannot be loaded into every barrel made.

So users need to be more selective in their ammo purchases. This is the whole reason for the "CZ Owners Preferred Ammo List" thread.

But a barrel can certainly be reamed to a point where it will accept any and all ammo... for people who prefer to believe there is such as thing as "standard ogive ammunition".

 

[bonj]

                                                 
However, based on no issues being found with the firing pin the only other possible issue that would prevent the firing pin from contacting the primer would be due to the slide not being fully closed. When this occurs it is usually from larger than standard ogive ammunition, or cases being slightly too long for this C.I.P.(European standard) dimensioned chamber.

[SI VIS PACEM PARRABELLUM]

There is no standard or larger than standard ogive. The case length for 9mm Luger is the same whether it's European or saami spec. We all know the CZ chamber can have short lead and that's why we adhere to the proper fitting to find the oal with each bullet we use.
I entertained having my CZ's reamed but decided against it. The accuracy of the guns is such that I wouldn't care to chance doing anything that might alter it. Even if you have chambers reamed you still have to push test any bullets you plan on handloading. If you don't you're just courting failure on your own part.

[Wobbly]

However, based on no issues being found with the firing pin the only other possible issue that would prevent the firing pin from contacting the primer would be due to the slide not being fully closed. When this occurs it is usually from larger than standard ogive ammunition, or cases being slightly too long for this C.I.P.(European standard) dimensioned chamber.

Show me the data. Forgive me, but I think this is an assumption on your part, possibly based on your own experience. It's valid experience, but it's simply not the whole view.

The most likely reason for the chamber to be held open in my experience is improper Taper Crimp. The there are several case abnormalities, including using cases that were loaded for Major PF rounds. Then there is also OAL simply too long. When you have a bullet like the Hornady XTP, the full diameter shoulder can stop the bullet from entering the chamber. The ogive is not in play at all.


Here's fired brass that won't/can't enter the chamber. No bullet is present.

Then there would also be the situation where a 380Auto case slipped in and got loaded. If it were not held by the extractor, then the cartridge could fall about 1/10" deeper into the chamber where the firing pin could not ever make contact.

The number of possibilities for "screw ups" is endless.

And again, there is no one formula for the shape of an FMJ ogive.

[bonj]

Sorry, I forgot to reiterate the remark was from the CZ Warranty Staff.