CZ 75 problems

[Weevil]

Well you've also got to keep in mind the 1911 has a larger heavier slide than the CZ.

There's more mass to get moving so it is always gonna open slower than the CZ. Plus the .45acp is also a much lower velocity round than 9mm.

Just relating my own personal experiences.

If you don't agree fine, but it is food for thought for those having this problem.


As to hammer spring weights I have no idea as I never tried this method, but I do know that since I went to a new slightly heavier recoil spring and extractor spring the pistol functions flawlessly. I didn't go crazy the factory rated spring according to Wolff is 14 lb and I went with a 15 lb, although I did get an 18 lb also and was prepared to try this if the 15 didn't cure the problem.

If you have the correct recoil spring that is getting the slide opening time correct and holding back the slide velocity then it really shouldn't matter what hammer spring you use.

But since the extractor and recoil spring were all probably weak changing the hammer spring would have probably helped too.

However since changing to a new correct weight recoil spring and extractor spring solved the problem I didn't try changing the hammer spring, even though it too maybe weak and contributiong to the slide velocity problems.



Like I say it worked for me just like the smith who gave me the idea said it would.

 

[Tired_and_hungry]

Latest Status

I went to the range today with 400 rounds of 9mm WWB. I contacted a friend who is a CZ fanatic and he agreed to meet me there with a spare extractor and spring. To cut a long story short, I arrive at the range an hour before he did and not wanting to waste anytime, I started shooting.

On my second magazine of 15 rounds, I experienced an FTE and in response to this, I disassembled the extractor and extractor spring, hosed out the extractor spring and extractor crevice, cleaned both the spring and extractor and returned to shooting.

The clean-up only produced a 90 round trouble free period and thereafter, I experienced two FTEs, one stovepipe and a premature slide lock back spread out over 120 rounds.

Finally, my friend arrived with the extractor and spring for me and after I swapped out the old extractor and spring for the factory fresh ones, I shot a trouble free string of 164 rounds.

My question is:

Is 164 rounds enough to prove that the new extractor and spring are definative cures to my reliability problems? How many more rounds should I fire to be certain?

Also, does anyone here own the factory 26 round CZ magazine? Are the last 5 rounds really hard to insert?

 

[Thompsoncustom]

I wouldn't say that 164 rounds would be enough for me 500 is a better number but its a personal preference kind of thing. I don't have a 26rd mag but I would imagine the last round would get pretty hard to insert, I run CZcustom's ex-powered mag springs and they make it a little tougher.

When I first got my CZ 75b 2 years ago my only complaint was that it was under sprung, had to replace the extractor spring right away a long with the mag springs but after that it runs like a champ. I'm sure CZ-USA would have done it for free but I got the ex-powered springs for both the extractor and the mags now about 5k rounds later there still going strong.

 

[solvability]

Consider changing ammunition - I found my CZ to be unhappy with fast powders and light bullets which WWB has - perhaps try some 124 or 147g bullets and see how it goes.

 

[Walt Sherrill]

Winchester White Box, in years past, had a poor record with many CZ shooters. Look at the extractor groove on the ammo and see if it is as deep and as clean as other ammos; in the past it was not, and offered a less clean area for the extractor to grab. They may have changed the ammo a bit since many of us noticed that problem. (As noted earlier, the groove, at one time look like this < rather than /.)

Is 164 rounds evidence of no problem? Given your experience and doubt about the gun, clearly not -- or you wouldn't be asking. Shoot a couple more boxes through it, and keep the extractor groove are on the slide clean. You don't have to pull the extractor to do that. as brake cleaner (or compressed air) under pressure will keep it cleaned out.

The CZ 9mm gun was designed around the Sellier & Bellot 124 gr round. If you can find that, you'll find a good match.

(Note: I only had extraction problems with one or two of MANY CZs, over the years, and then only when shooting WWB. A new spring fixed those problems, but I found other ammo I liked better. I often shoot Blazer, and many CZ shooters have problem with it. I never have had problems.)

 

[miles1]

I went to the range today with 400 rounds of 9mm WWB. I contacted a friend who is a CZ fanatic and he agreed to meet me there with a spare extractor and spring. To cut a long story short, I arrive at the range an hour before he did and not wanting to waste anytime, I started shooting.

On my second magazine of 15 rounds, I experienced an FTE and in response to this, I disassembled the extractor and extractor spring, hosed out the extractor spring and extractor crevice, cleaned both the spring and extractor and returned to shooting.

The clean-up only produced a 90 round trouble free period and thereafter, I experienced two FTEs, one stovepipe and a premature slide lock back spread out over 120 rounds.

Finally, my friend arrived with the extractor and spring for me and after I swapped out the old extractor and spring for the factory fresh ones, I shot a trouble free string of 164 rounds.

My question is:

Is 164 rounds enough to prove that the new extractor and spring are definative cures to my reliability problems? How many more rounds should I fire to be certain?

Also, does anyone here own the factory 26 round CZ magazine? Are the last 5 rounds really hard to insert?

Ive had a factory new CZ 75B for maybe 3 weeks now.The 2 new mags i have are kinda stiff esp/ when loading the last few rounds.

A friend of mine said that he trusts a a gun if it shoots 100 rounds without an FTE/FTF.Personally for HD i would say 200-300 IMHO.Glad your CZ is working after a new extractor/spring.

 

[JDGray]

The premature slide lock can be fixed with a simple slide stop modification. The tips of the bullets are probably hitting the nub, and it will need to be clearanced. There is plenty of contact area for the mag follower to engage, but still be carefull to not take too much off.

 

[edfrompa]

Make sure the ramp on your firearm is clean and shiny. If the ramp is cruddy you will have FTF.