Are cz firearms undersprung?


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glassman
December 24, 2010, 10:03 AM
I was reading a thread on another forum and a statement was made with regard to CZ's being under sprung from the factory. The poster stated this was particularly true about the recoil spring. He said he installed a more powerful spring which helped to reduce recoil. I'm not sure this is true and would like some confirmation from CZ owners out there. I have a few thousand rounds through my compact and have been thinking it's time to change out the springs just on general principals. I checked the Wolff site and saw the many offerings but am a bit confused as to which springs would offer best performance.

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REAPER4206969
December 24, 2010, 10:07 AM
The P-07 has the heaviest recoil spring I've ever felt.

BullRunBear
December 24, 2010, 10:20 AM
I have put several thousand rounds through a CZ 75b and even more 22s through the Kadet adapter. Recoil is mild, no failures or sticking, commercial and handloaded 9MMs all work. Seems to me the factory springs are just fine. he CZ is the best semi auto I've ever handled.

Jeff

kokapelli
December 24, 2010, 11:56 AM
I've never had a problem with mine and the stock springs.

glassman
December 24, 2010, 12:22 PM
I've never had a problem with mine and the stock springs

I've never had a problem either but the post I read had me wondering if I could improve performance. Does anyone know if Wolff offers a spring kit for the CZ compact?

Philo_Beddoe
December 24, 2010, 12:45 PM
The mainspring is often over sprung. In both my 75b and sp01 i replaced the 20lb factory mainspring with a 15 pound and got a much lighter trigger pull and never had a light strike in 10000 plus rounds.

Never felt the need to mess with the recoil springs


The mag springs can often be a bit weak, i never had any feeding problems, but during USPSA compatitions I would often get mags hung up in the mag housing if I dropped a mag with rounds in it due to weak mag springs.

I put +10% mag springs in my mags and it solved the problem

glassman
December 24, 2010, 01:50 PM
i replaced the 20lb factory mainspring

I did the same thing early on and it's worked well. I get a few failure to fire incidents when I have the Kadet conversion on it. I save them and shoot them through my Weatherby XXII. When I changed out the mainspring, I took the oportunity to bend the mag break out of the way as well.

verdun59
December 24, 2010, 02:20 PM
Stock springs run my 75B and PCR just fine, never had a problem.

tekarra
December 24, 2010, 06:43 PM
Google up Wolff and check their catalogue.

SharpsDressedMan
December 24, 2010, 08:22 PM
My Pre-B's seem to need a bit of a refurb (they are all over 20 years old) with stronger mag springs, and I have also needed a few mag catch springs that were newer/stronger than the originals. I'm sure all need recoil springs, and levels of recoil springs and hammer springs could be had to suit the shooter or loads used. Probably a Wolff rehab kit with a factory mag catch spring (Wolff doesn't include those) would be good for older guns.

rbernie
December 24, 2010, 08:31 PM
The magazine and extractor springs are weak and can/should be uprated, and the mainspring is strong and can be downrated a bit. The recoil spring is just right and ought not be changed at all, lest you risk prematurely breaking the slide stop.

1SOW
December 24, 2010, 11:58 PM
rbernie: +1 --- mostly.

Here's the deal. The gun is sprung for 124gr ball full strength ammo.
If you're shooting+P ammo, it could use more recoil spring.
If you like light target/competition loads it needs a lighter recoil spring to extract and eject better.

I agree that the heavier extractor spring is a good idea. I also absolutely agree that changing the hammer/mainspring to 15# is a 'must', due to the greatly improved trigger pull gained with a simple spring change.

JDGray
December 25, 2010, 12:46 AM
If judging by how far away your brass lands, the recoil spring is to light. And as the others have already stated, the main spring can be dropped safely a few pounds. Mags for my cz are pretty easy to reload, but have not induced any failures. I'm refering to an older fullsize 75B-SA, the newer models may be sprung just fine:)

viking499
December 25, 2010, 12:51 AM
I also absolutely agree that changing the hammer/mainspring to 15# is a 'must', due to the greatly improved trigger pull gained with a simple spring change.

What is the pounds on the factory spring?

Thompsoncustom
December 25, 2010, 01:28 AM
I would say that the extractor spring from the factory is under sprung and should be replaced with a wolf EX extractor spring and the the hammer sprung is over as the stock spring sits at 20lb which makes the DA pull very heavy. I better option would be anywhere from a 13lb hammer spring with a longer firing pin for target up to a 17lb carry in my opinion. I have a 15lb hammer spring in mine which I use for both target and carry I find it to be the best all around hammer spring for the gun.

Walt Sherrill
December 25, 2010, 09:45 AM
The answer to that question will probably depend on WHEN you bought your CZ.

Over the years, CZ had a spate of bad springs -- trigger springs a few years back, and extractor springs. That has been fixed, and they've upgraded their extractor springs.

The recoil spring, years back, was rated at 16 lbs. for the 9mm model, but actual measurement of the spring showed something like 12 lbs.

I've had MANY CZs, and the only problems I've had have been with the extractor. The Wolff replacement extractor spring solves the problem.

re: recoil springs.

The Wolff replacement spring is really a spring designed for the EAA line, and the coils are larger in diameter.

Browning Hi-Power springs are almost identical to the CZ factory springs, and come in a variety of weights, including a variable-rate spring. I use them, instead of the CZ/Witness springs available on the Wolff Site.

A heavier recoil spring will change the recoil impulse, but can -- if too heavy -- cause other problems. A heavier recoil spring will also SLAM FORWARD with greater force, and that puts greater pressure/force on the slide stop and could, over time, lead to slide stop failure. (The only time the slide stop really does much is when the slide slams shut...)

viking499
December 25, 2010, 09:55 AM
I have a PCR and a P01 that are about 2 years old. Both are alloy frames. Currently only shooting factory loads, 115 and 124.

Would I benefit from replacing any of the springs on either gun? Which springs replaced with what springs? Where is the best place to get replacement springs?

Lobo_79
December 25, 2010, 10:55 AM
The magazine and extractor springs are weak and can/should be uprated, and the mainspring is strong and can be downrated a bit. The recoil spring is just right and ought not be changed at all, lest you risk prematurely breaking the slide stop.

This advice was certainly true for my 2007-vintage CZ75B .40 SW. I used a combination of the Wolff extra power extractor spring, an 18 pound recoil spring, and the extra power magazine springs to tune my gun. It actually took all 3 to fix my problem but the primary issue was a pathetically weak extractor spring.

glassman
December 25, 2010, 12:09 PM
My gun was made in '05. Shortly after buying it, I changed out the main spring to a 15# which gave me a lighter trigger. A year or so ago, I had a failure to feed issue. About one round in ten would hang up in the barrel throat. I also noticed that the empties were flying a little farther than they usually did. I changed out the recoil spring and the mag spring in both mags with factory supplied items. I noticed at the time that the mag springs had more tension to them and figured the original springs were just worn out. The change in springs and a more liberal use of grease on the rails fixed the problem. From what you guys have said, it looks like a change of the extractor spring is as far as I need to go. Thanks for helping me out.

Lobo_79
December 25, 2010, 01:17 PM
MAbout one round in ten would hang up in the barrel throat...

Glad that worked out for you. My extractor spring was so weak it would leave an empty case in the chamber about every 5th round or so. With the Wolff extra power extractor spring I think the extractor itself would tear a chunk out of the rim before it failed to operate. My failure to return to battery/feed problem was definitely a recoil spring issue with .40 S&W 180 gr JHP rounds, FMJ rounds fed okay.

Radjxf
December 25, 2010, 03:51 PM
IMO almost all of the CZ springs should be thrown away. The full-size 75 guns are generally oversprung in terms of the recoil spring and hammer (mainspring).
The extractor springs are generally weak and are best replaced by a Wolf extra power spring. I'd also keep a spare trigger spring, as these are known for failures.

jeepguy
December 25, 2010, 08:33 PM
my compact seems ok but i will keep an eye out for these problems. i wonder if the spring issue is a problem in the compact as well, anybody know? if everybody knows about this, then i wonder why hasn't cz done anything about it?

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