Author Topic: Problem W/ New-Unissued CZ-52-New Pics added  (Read 2285 times)

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Offline Hammerspur

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Problem W/ New-Unissued CZ-52-New Pics added
« on: April 20, 2009, 12:18:42 AM »
My friend's recently acquired CZ-52 gave us a problem when we were examining it for the first time:

We were feed testing it, hand cycling rounds of the Bulgarian ammo we bought cans of through it...
(w/firing pin removed)
About the 6th of the first clipload a round stuck firmly in the chamber refusing to be extracted.
Had to break down the pistol and knock out the stuck one from the muzzle.

Hand fitting several rounds to the breech of the removed barrel I noted tightness from several and repeated sticking from the original problem one.
The same Bulgarian mil-surp from my tin cycles through my blued, re-arsenaled CZ without a hitch.

His pistol was sold as "unissued" and it looks it... Very fresh general appearence, nearly flawless parkerizing, almost too crisp action of moving parts and few maufacturer/arsenal markings.
Eyeballing the chamber it does look a might coarse, so I suspect that's the culprit.
I'm hoping to get it smoothed out by polishing.

I was thinking of making chamber hones by pulling bullets from a couple rounds, depriming the cases, drilling out the primer pockets and installing a machine screw/stud as an arbor.
Would then coat the case with lapping compound and twirl the tool in the rough chamber.
I've 120, 220, 320 and 600 grit compound on hand.

Hoping to hear from someone who's also experienced this difficulty and/or know of the best remedy.





 
Steve
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Of course guns are dangerous... if they weren't they wouldn't be good for anything!

Offline SM Bob

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Re: Problem W/ New-Unissued CZ-52
« Reply #1 on: April 20, 2009, 02:04:37 PM »
I haven't had that problem with a handgun, but I have lapped the chambers of several
milsurp rifles with the procedure you described and it worked out great! Just my opinion,
but I would stay away from Bulgarian ammo. From what I have heard the quality and
consistency isn't that great and much of it was loaded for submachine guns, so it is
pretty hot. Sure it goes BANG when you pull the trigger, but  I would stick with Romanian
or Polish 7.62X25. Century has the Polish with no split necks in the 1260 round spam
can for $109 + shipping.

Offline Hank08

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Re: Problem W/ New-Unissued CZ-52
« Reply #2 on: April 21, 2009, 06:03:57 PM »
Hammerspur, I think what you stated will work but you'll probably only need the 600 grit to get the small amount needed to chamber.  Did you try dropping the slide on the reluctant round to see if it would feed? It might seat and be shot out and you'd never know it was tight.
Maybe, maybe not.
H08

Offline Hammerspur

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Re: Problem W/ New-Unissued CZ-52
« Reply #3 on: April 21, 2009, 11:19:18 PM »
Hank, we did drop the slide on it, but round didn't feed completely into chamber which resulted in jamming up the whole works... couldn't re-cycle because the extractor had hold of the stuck round's rim.

I dropped the mag, pressed on the back end of the extractor to see-saw it off the rim, dropped the slide again, no dice.
Had to pull the top end, remove the bbl. and tap out the round with a dowel.

I would not have wanted to fire this round as it loaded...
- it only fed about 7/8 into chamber
- we were then sitting at my friend's dining room table!  :o

Haven't had time to re-examine everything yet, work and such, but this isn't over and it's definitely not going unresolved.  >:(
My buddy's just as stubborn as I am!  ;)
Steve
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Offline Lee N. Fielder

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Re: Problem W/ New-Unissued CZ-52
« Reply #4 on: April 22, 2009, 12:24:06 AM »
Get a magnifying glass and examine the Bulgarian ammo for split case necks.  I bought one batch of the Bulgy stuff and had to discard about half of it due to split cases. 

I don't think you can troubleshoot the gun with the Bulgarian ammo.  You need to buy one box of either S&B or Prvi Partizan brass-cased 7.62 x 25 ammo and perform the same tests you are currently trying.  If the problem persists with the factory commercial ammo then you have a gun problem.  If the problem goes away then you have a Bulgarian ammo problem.  Personally, I'm betting on the latter.

-Lee

Offline Hammerspur

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Re: Problem W/ New-Unissued CZ-52
« Reply #5 on: April 22, 2009, 12:30:52 AM »
Get a magnifying glass and examine the Bulgarian ammo for split case necks.  I bought one batch of the Bulgy stuff and had to discard about half of it due to split cases. 
I don't think you can troubleshoot the gun with the Bulgarian ammo.  You need to buy one box of either S&B or Prvi Partizan brass-cased 7.62 x 25 ammo and perform the same tests you are currently trying.  If the problem persists with the factory commercial ammo then you have a gun problem.  If the problem goes away then you have a Bulgarian ammo problem.  Personally, I'm betting on the latter.-Lee

Thanks, I will check it out, But, the Bulg stuff works fine in mine including the round that got stuck in my friend's chamber.
Steve
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Offline Hammerspur

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Re: Problem W/ New-Unissued CZ-52
« Reply #6 on: April 23, 2009, 02:55:05 PM »
Here's a pic of the chamber lap I made for working on my friend's barrel:


Here's a good chamber:


Here's the chamber in question:
  :o

See any call for a little cleaning up?  ::)
Steve
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Of course guns are dangerous... if they weren't they wouldn't be good for anything!

Offline Hammerspur

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Re: Problem W/ New-Unissued CZ-52-New Pics added
« Reply #7 on: April 24, 2009, 12:58:29 PM »
Just today received the new barrel I ordered for my 52 as 'insurance'.
The rifling in my original isn't well defined with nice square edges... bore's nice and shiny but the lands don't have sharp definition, kinda' rounded looking, ya' know?
 
So it could be shot out or more likely, 'cleaned' out.
 :P Probably got rusty from some negligent sort shooting corrosive milsurp and subsequent overzealous "cleaning" blunted things some. 

So I have another, new barrel also. (OCD anyone?!  ::))
Why Not at this price: http://whatacountry.com/cz52barrel762x25.aspx
Got the cam, rollers & pin for it already so I'll have 2 complete bbls. to compare for shooting accuracy!

The new one looks pristine with a clean smooth chamber that takes rounds willingly, sharp rifling and nice bluing!  :D
My amigo may need to get another bbl. His rifling doesn't look all that healthy to my eye.
BUT we'll see if we can't square this chamber situation up right first, then shoot the bloody thing and find out.  ;)
Steve
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Of course guns are dangerous... if they weren't they wouldn't be good for anything!

Offline Hammerspur

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Re: Problem W/ New-Unissued CZ-52-New Pics added
« Reply #8 on: April 25, 2009, 12:28:47 PM »
I'm done with my friend's chamber!
Came out good, feeds and shucks without a hitch now and no slop.  ;)
Steve
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Offline Hank08

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Re: Problem W/ New-Unissued CZ-52-New Pics added
« Reply #9 on: April 26, 2009, 05:26:47 AM »
Good job! Hammer, glad it turned out well.
H08

Offline PA-Joe

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Re: Problem W/ New-Unissued CZ-52-New Pics added
« Reply #10 on: April 26, 2009, 05:34:55 AM »
You may also want to spin test that ammo in the barrel before using it. Some have too long a COL. While you have the barrel out just hand spin the rounds in the chamber. Then get a set of dies and reset the COL on the longer rounds.

Offline Hammerspur

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Re: Problem W/ New-Unissued CZ-52-New Pics added
« Reply #11 on: April 27, 2009, 03:31:21 AM »
You may also want to spin test that ammo in the barrel before using it.

Joe, thanks for reminding me!  ;)
I returnerd the bbl. to my friend Mike, so I called and told him to do the spin test.
Steve
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Of course guns are dangerous... if they weren't they wouldn't be good for anything!