CZ 600 soft primer hits

y2k

y2k

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Have a cz 600 in .223 and using fedearal American eagle I’m getting 20% misfire due to light hit on primer. My question.
1 anyone else experiencing this
2 I want to get a 7.62-39 version but shoot military surplus (Czech) and question if rifle will work
 
When I had light primer strikes I. The past I dissasembled the bolt and cleaned out the firing pin channel. That completely fixed the problem. Factory grease on new rifles sometimes causes this issue.
 
The whole firing pin arrangement is pretty dinky, one if the things that turned me off these rifles.
PXL-20231021-230300702-2.jpg
 
Wow, a picture is worth a thousand words! The firing pin/spring assembly on a Howa mini is Huge in comparison. I wonder how the 600 in 7.62 x39 does with surplus primers?
 
I was actually here to see if anyone had the same issue. i have the rifle in 7.62x39 and had experienced basically the same thing (however mine was likely closer to 30%-40% fail to fire).

I bought my rifle new (not sure if you were the same). The canadian warranty center for CZ is Wolverine supplies, my rifle has been sent back and they said it was "Fixed".

I asked them if they would be willing to share how it was fixed and the answer I got was ;
"The gunsmith adjusted the firing pin as it wasn't striking the primer far enough to fire everything. With the adjustment it is striking the primer better and had 40 rounds without issues"

Now I came to the forum to see if anyone know how one would adjust the firing pin?
 
brandon6976 said:
I was actually here to see if anyone had the same issue. i have the rifle in 7.62x39 and had experienced basically the same thing (however mine was likely closer to 30%-40% fail to fire).

I bought my rifle new (not sure if you were the same). The canadian warranty center for CZ is Wolverine supplies, my rifle has been sent back and they said it was "Fixed".

I asked them if they would be willing to share how it was fixed and the answer I got was ;
"The gunsmith adjusted the firing pin as it wasn't striking the primer far enough to fire everything. With the adjustment it is striking the primer better and had 40 rounds without issues"

Now I came to the forum to see if anyone know how one would adjust the firing pin?
Click to expand...
Stiffer spring is the only thing I think would fix it, firing pin is too light and doesn't have enough inertia for a light spring, whole design is kinda disappointing to be honest, I have a couple 527's and they are amazing rifles.
 
well 527 is discontinued. I get you guys are sore on that and I never experienced owning a 527.

That all being said I do like my 600 a lot, obviously has the light primer strikes but everything else on how it functions is one of my fav rifles. CZ has the line has expanded. I'm guessing if it is something like a spring the newer versions of the 600 (they have all sorts of MDT chassis models) have a newly designed spring (if it is indeed the spring causing the issue).

I'll email wolverine again and see if they're willing to share more. I say that as they said the gunsmith "adjusted" the firing pin (I would assume they would otherwise wrote "we replaced the firing pin spring").
 
brandon6976 said:
well 527 is discontinued. I get you guys are sore on that and I never experienced owning a 527.

That all being said I do like my 600 a lot, obviously has the light primer strikes but everything else on how it functions is one of my fav rifles. CZ has the line has expanded. I'm guessing if it is something like a spring the newer versions of the 600 (they have all sorts of MDT chassis models) have a newly designed spring (if it is indeed the spring causing the issue).

I'll email wolverine again and see if they're willing to share more. I say that as they said the gunsmith "adjusted" the firing pin (I would assume they would otherwise wrote "we replaced the firing pin spring").
Click to expand...
Look for a used one, they are nice rifles.
I had a 600 Lux in 8x57, tore it all apart, looked at all the guts, didn't give me warm fuzzies.
Shot 10 rounds through it and took a beating selling it on consignment.
LOP was ridiculous, comb angle smashes your cheek every shot, sounded like a tuning fork after every round, riiinnnggg...that sloppy firing pin design.
Extractor spring is a short piece of piano wire, the 6 lug bolt...well there isn't much engagement on any of them, those tiny little lugs, maybe 1/3 flat for engagement. Too iffy for me, I think they are junk lol
PXL-20231021-230546361-2.jpg

PXL-20231021-230745129-2.jpg
 
Either way it's obvious some just wanna hate on the new 600. which is fine, doesn't help to understand the original question, which is how to fix the light primer strikes.

I sent my rifle in. I should likely be getting it in my hands mid/late next week (i'm guessing Aug 14 or 15th) and by the weekend I'll give it another shot. I'll also try email wolverine and the guy who was emailing me with updates. Hopefully they're able to disclose what the "fix" was as others I'm sure would love to do the same (if it's a new spring or adjustment somehow internally).
 
Well, from looking at the firing pin assembly, it doesn't look easy to take apart at home.
From what I recall when I had mine, the cocking piece doubles as the firing pin stop, there is no "adjustment" anywhere on the assembly, so yeah, I'd be curious to the fix as well.
600 mags are garbage as well btw.
I bought one, gave it a go, realized it's kinda garbage, I've owned too many different rifles to even mention here, the initial appeal was the switch barrel they promised, first few months after release someone in the US blew his up after switching barrels, dunno what happened, but it ####canned the whole switch barrel idea. Maybe too complicated for the average dummy? I dunno but it should have been designed so that could never happen. They dropped the 527 and 557 to make these 600's, I wish there was something I could like about them, well actually there is... fully nitrated on all steel parts, that's a good thing. Otherwise there isn't anything I like.

Should not happen at all with 223 like OP issue.
I shot a bit of steel case x39 Barnaul through my 527 worked fine, #### accuracy but all went bang. I wouldn't shoot surplus corrosive through my 527, it's way too nice and #### accuracy, that's for SKS and stuff lol.
Handloads with the x39 527 are silly accurate, ragged hole, I was impressed enough that I dished out for a 223 version just before they were off the shelfs, it's also silly accurate.
Plus...look at this thing, everything is the right size for small cartridges, set trigger comes standard, no plastic, just refined awesomeness lol.
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Doubtful Wolverine will divulge what if anything they did. There are no adjustments to be made, the parts are what they are.

More that a few you tube videos on light strikes with these guns.

I’ve owned lots of zg47 and zkk guns they ALL went down the road, It’s not just cz600 hate. Switch barrel rifles have all been commercial failures save the Blaser r8. The 600 is a poorly executed example.
 
m1008 said:
^

Doubtful Wolverine will divulge what if anything they did. There are no adjustments to be made, the parts are what they are.

More that a few you tube videos on light strikes with these guns.

I’ve owned lots of zg47 and zkk guns they ALL went down the road, It’s not just cz600 hate. Switch barrel rifles have all been commercial failures save the Blaser r8. The 600 is a poorly executed example.
Click to expand...
I agree with the switch barrel stuff, really never appealed to the US market, other then the TC Contender/Encore single shots, everything else failed.
Even the TC Dimension which was a budget oriented gun but well designed for switching barrels/bolts, you could run 204 Ruger to 300 Win mag, and the conversion kits were not expensive at all, $500 rifle and conversions were $250ish.
But that stock design... wheh, that is what killed it I think, nobody would want to be seen in public with that, ugliest stock I've ever seen by far.
 
The zkk 601,600,602 and respective 550 “copy” guns are the only ones I’m aware of that have fine threads and a screw on collar, on the firing pin that retains the spring.

The pic you posted that’s one stubby spring. What’s the function of that “c” cir-clip just forward of the collar on the pin?

Anybody measure pin fall distance with the bolt in and out of the rifle?
 
I'm not sure what you mean by this? How do I measure the distance of the pin fall that you mention?

As an aside, I did get my rifle back. It does appear to be functioning. I fired about 40 rounds through it with all rounds going off (before I couldn't get through 10 before at least 2 didn't work). So something was done (i'm guessing spring).
 
brandon6976 said:
I was actually here to see if anyone had the same issue. i have the rifle in 7.62x39 and had experienced basically the same thing (however mine was likely closer to 30%-40% fail to fire).

I bought my rifle new (not sure if you were the same). The canadian warranty center for CZ is Wolverine supplies, my rifle has been sent back and they said it was "Fixed".

I asked them if they would be willing to share how it was fixed and the answer I got was ;
"The gunsmith adjusted the firing pin as it wasn't striking the primer far enough to fire everything. With the adjustment it is striking the primer better and had 40 rounds without issues"

Now I came to the forum to see if anyone know how one would adjust the firing pin?
Click to expand...
Maybe some careful dremeling/milling to the pin stop surface, allowing the pin more forward travel?
 
boxhitch said:
Maybe some careful dremeling/milling to the pin stop surface, allowing the pin more forward travel?
Click to expand...
No need, As mentioned I sent my rifle in and it appears that it's come back "fixed" I'm guessing they put in either a new pin or a new spring. I've only fired 40 rounds since getting it back but want to try and do another range visit this week.
 
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