CZ 52 problem -- ammo or springs ? ? ?

[Banker Billy]

Hello one and all . . .

Have a question:

Own a couple of CZ 52's, both dated "53". Great handguns to shoot, by the way.

When I use surplus ammo (Bulgy (?), dated "55") I get a miss-fire once in ever 20 rounds or so. Second hammer strike always fires the round. At this point I have not been able to purchase "commercial ammo" and try it out.

So . . . . does my CZ's have weak hammer springs, or is it the ammo ? ?

Anyone else have this problem, and if so, what did you do ? ?

Thanks ! !

[ftierson]

I have not had this problem with the Bulgarian ammo.

But, my first guess would be that it's the ammo.

What does the primer strike look like on the misfires?

[sf46]

Your problem is probably hard primers in your ammo or your firing pin might not be protruding far enough through the bolt face into the primer.

[bouncer50]

I have had this type of problem with different type of old surplus ammo. 7.5 french, 8mm mauser. It just something i can put up with. Buy some commercial ammo and try it out. I am betting it the old ammo.

[RS39]

Sure it's Bulgy, not Yugo or Pole or...

Headstamp besides 55?

[simpleton]

As everyone says check your primers and see how deep the dent is. If its shallow or not uniform, check the firing pin (CZ52s love to eat these) and hammer spring. It the dents look plenty deep and uniform, blame the ammo. I use S&B and have been pleased with it. I love my CZ, just a word of warning, don't trust the de-cock. On my CZ it acts like a second trigger......




Simpleton

[vmtz]

If they have the org firing pins, don't dry fire them. The firing pins break.

Vince

[Derby FALs]

I wish mine would feed.

[Banker Billy]

me again . . . .

I have been using two types of ammo, and both have this problem.

First ammo is in a paper wrap, tied with string and 16 rounds to a "wrap".

Second ammo is packed 70 rounds to a light-weight cardboard box.

Both are dated either "54" or "55".

When the ammo mis-fires the primer had a "dent" but not as deep as when the round fires. Second hammer strikes always fires the "mis-fired" round.

Make sense ? ?

Now what ? ? ?

[Bocefus]

Mine had the same problem with certain surplus ammo. I bought some commercial ammo, and the problem went away. I think a lot of the surplus ammo have hard primers so try some commercial stuff.

[ammolab]

On any Misfire the primer dent will look shallower than that of a fired round....the fired round has 30,000+ PSI pushing it back on the firing pin. This set back deepens the firing pin indention. On a misfire, the round simply moves forward as far as the headspace in the particular firearm allows....this shallow dent is how they all look microseconds before the BOOM!!!

[RS39]

It's easy to blame hard primers from SMG rounds. But being able to share ammo is why this gun was made! Without a spring gauge, mosey on over to Makarov.com and buy more.

I hate mechanics who replace stuff until it runs, but this seems best now..

[TideWater 41009]

There could be a build-up of crud on the firing pin or in its recess. Remove the pin and spring and thoroughly clean the firing pin, the spring, and the recess.

Same for the main spring.

[ONG]

Billy,

You obviously have bad guns. I'll give you $20.00 for each one.

I have some S&B if you want to give that a try.

[ammolab]

Those Primers are not "hard" or "SMG"....they are 50 Friggin YEARS OLD! If you had .38 Special from 1950 misfire would that be a hard/MG primer in there too??

[Banker Billy]

Hey ONG . . you are just to kind . . .

NOT ! ! ! !



ONG is going to sell me some of his Romy ammo and I'll pick up a couple boxes of S&B at the next toy show.

And RS39 - - - did order a couple of new FP springs. And a "steel" FP too.

I'll post my results -- new ammo and spring -- when I get the chance.

By the way - - - I have shot a BUNCH of "41" dated 45 ACP ammo in two different 1911's -- never any problem. But that's not saying that this ammo, dated "55" is still reliable . . . .