Check your Fiocchi

[bonj]

Here is a Reply from CZ on one of my CZ 75B omega's warranty issues with a failure to fire....

...... they could not find any issues normally with the firearm. They confirmed the function but also lengthened the chamber throat to allow the fitting of larger than standard ogive ammunition as mentioned in the latter part of the Gunsmith’s notes.                                                                                                                                                                                                                                 
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.

The chamber throat is an area of clearance for the projectile to sit, so that it does not contact the rifling when the cartridge is inserted into the chamber, as seen in this drawing of a rifle chamber from the internet:   

Instead of using a CIP reamer we use a SAAMI reamer.

[bigcrock]

Thanks,

This explains the issue I had with Blazer Brass.  Failure to Fire with no firing pin strikes on primer. Happened on both CZ 75B Omega & CZ P-01 Omega.

[Davehb]

Good to hear they looked into it and did waht they could to help.