VZ 58 unreliable with MFS and PPU ammo.

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fat but funky

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Hi all,

I did a search and a brief scan through the FAQ's, but didn't see anything.

I've noticed my VZ-58 (7.62x39) is finicky about what you feed it. Specifically it seems to like North American ammo only. I'm wondering if other guys see this, or if there is something wrong with my rifle.

Fed. American Eagle - FMJ, brass case - likes it fine, completely reliable (have gone through maybe 100 rounds)

Hornady - zombie ammo (SST bullet and steel case) - likes it even more - most accurate I have tried so far (gone through maybe 40 -60 rounds)

MFS - FMJ steel case - does not like at all. Bolt would kind of stick closed after firing. Once I needed a block of wood to open the thing. Stopped shooting it after that. Ammo also seemed alot "hotter" than the Fed. or Hornady.

Barnaul (which I understand was loaded by MFS) - Periodically fails to fire. The trigger lets go and the "striker" falls on the pin, but no bang. Primer looks like it should have fired. Rechamber same round, pull trigger, still no bang. Put in another round and everything is fine again

PPU - round nose soft point, brass case - same deal as the Barnaul.

Thoughts. Do I need to replace the firing pin? the whole bolt? Headspace issue?

The cases looked ok to me (with the exception of some primer cratering on the MFS), no cracks, no crazy residue on the mouth.

Thanks

Fat
 
Sorry, but all three VZ-58's I have eat everything I feed them, including MFS/Barnaul. 18.5", 11.8" and 7.5". I am guessing that it is a rifle thing. My brother's AR10 had the same primer issues with MFS .308, however...
 
Sounds like the same issue i had. If it is check your headspace. Also with the bolt open look at the barrel in the receiver to see if thr barrel is shifting forward. It seems your gun likes only soft primers. Mine was the same then it blew up in my face haha.
 
Adamlxlx said:
Sounds like the same issue i had. If it is check your headspace. Also with the bolt open look at the barrel in the receiver to see if thr barrel is shifting forward. It seems your gun likes only soft primers. Mine was the same then it blew up in my face haha.
Click to expand...
Mine also almost blew up in my face. Luckily I have OCD and inspect it after every 10-20 rounds to find my carrier cracked along the slide lip. The time before was a broken bolt. Not so Ha Ha...... 150 rounds since last breakage and seems to be holding up for now.
 
fat but funky said:
Hi all,

I did a search and a brief scan through the FAQ's, but didn't see anything.

I've noticed my VZ-58 (7.62x39) is finicky about what you feed it. Specifically it seems to like North American ammo only. I'm wondering if other guys see this, or if there is something wrong with my rifle.

Fat
Click to expand...

What make is your VZ? CZ, CSA?

armilaria said:
Mine also almost blew up in my face. Luckily I have OCD and inspect it after every 10-20 rounds to find my carrier cracked along the slide lip. The time before was a broken bolt. Not so Ha Ha...... 150 rounds since last breakage and seems to be holding up for now.
Click to expand...

CSA?

The CZ858's I have seen have eaten absolutely everything that fits in the chamber without hiccups.
 
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