1. One of the "facts of life" when shooting someone else's ammo (or even goodly quantities of factory ammo) is that you sincerely need to review....
• Squib rounds
• Second strike / high primer rounds
• Slam fire rounds
• Hang fire rounds
That's roughly the order of occurrence too.
You don't need to check for this with military ammo because it goes through a hundred more tests and checks that civilian ammo doesn't. So
complacency and simply 'not knowing' are your worst enemies.
2. Part of that personal education is to
be aware that CZ pistols have extremely short freebore chambers. As such, you need to be very skeptical of any new-to-you ammo. Always remove the barrel from the gun and do the
drop-in, spin freely, and drop-out tests before you buy (if possible). This is why we suggest you take your naked barrel with you to Walmart or your LGS when ammo shopping locally. The simple truth is:
Not all ammo offered for sale will safely fit the CZ chamber. When ammo is too long for the CZ chamber, then the gun may be allowed to fire Out Of Battery (OOB), that is... with the chamber only partially closed. That may lead to case wall blow out, and the ensuing shower of hot gas and brass bits. Those occurrences will typically
end the life of a polymer gun... and result in more trips to PT.
