CZ-75BD jams

[CZ-75-BD]

Hello,
I'm new here and need some help.
On Sunday I took my CZ-75BD to range and trouble started.
It jams constantly. I bought recently new loads of ammo Made by Stone Hart 115GR Manufacturing. Before I used Winchester bulk from Wal-Mart 115GR and had no problems. Does anyone know something about that ammo?
Also I used new mags MEC-GAR MG-CZ75-9MM. What would be most possible causing problems mags or ammo?
Thank you

 

[vzwnnj]

I have a CZ 75 SA and MEC GAR mags...no issues whatsoever...if you had no issue before using this ammo, it really points to that...try the Winchester again and maybe some other 9mm ammo...but really sounds like the ammo is your issue

does the Winchester work with the MEC GAR mags...im betting they will just fine

 

[Rancho Relaxo]

The only time I've had problems with my 75BD is when I shoot ammo that is loaded too long. The Meg-Gar mags are reliable, I'll bet it's your ammo. Be more specific in describing your "jams", did it fail to eject, fail to feed or stovepipe?

 

[blikseme300]

I don't know the ammo you were using, but I do know the CZ75BD quite well. Most modern CZ's have quite tight tolerances in the chambers and have a very short leade. The remanufactured ammo is most likely out of spec for your pistol.

An example of the differences is this: ammo that will feed reliably in my Browning HP will not work in my CZ's. Ammo that does feed reliably in my CZ's will work in the BHP as well.

Bliksem

 

[billybob44]

Hello,
I'm new here and need some help.
On Sunday I took my CZ-75BD to range and trouble started.
It jams constantly. I bought recently new loads of ammo Made by Stone Hart 115GR Manufacturing. Before I used Winchester bulk from Wal-Mart 115GR and had no problems. Does anyone know something about that ammo?
Also I used new mags MEC-GAR MG-CZ75-9MM. What would be most possible causing problems mags or ammo?
Thank you

The likely cause is the ammo. I have never shot Stone Hart ammo, but I can tell you that my CZ P-01 will shoot any 9mm load that I put through it. It has had a steady diet of my hand loads, both jacketed and cast, with not a stoppage. The MeGar magazines are the Factory replacements for the CZ pistols, so that should not be the problem. Try some more WW White Box ammo from WallyWorld, to prove it to yourself. The CZ's are knowned for their dependability. I know mine shoots every time.. Bill..

 

[CZ-75-BD]

It fail to feed , I ejected it easy. Also when I was cleanning gun I find out dirt, i cleanned out but did no tried again to shoot yet.

 

[Broken Anvil]

I have a CZ85 with about 1000 rounds through it with no malfunctions whatsoever. Mec-gar also makes the factory mags for CZ so they will work just fine. Midway has them on sale for about $20 right now. Watch out for the bulk 100 round Winchester white box ammo from Wally World, I'm told it's not the same as the regular 50 round box stuff. I checked some 380 out and sure enough, it was completly different and seemed to be a little weaker. Enjoy your CZ, it's one of the finest guns out there.

 

[SwampWolf]

Watch out for the bulk 100 round Winchester white box ammo from Wally World, I'm told it's not the same as the regular 50 round box stuff. I checked some 380 out and sure enough, it was completly different and seemed to be a little weaker.

In my experience, white box is white box. I've never seen a difference between Winchester ammunition "white box" ammo packed in 25 round boxes vs 50 round boxes nor have I ever seen a difference based on where it was purchased from-and I've shot an awful lot of these stuff in various calibers, including .380 ACP, 9mm Luger, .40 S&W and .45 ACP. Not saying others haven't and not speaking for them, just reporting my own experience.

 

[Ohio Gun Guy]

Another post had a similar issue. The conclusion was the ammunition. Apparently some 9mm is longer or Fatter and the cz pistols dont like it. (Throat Length and / or bullet shape)

 

[stangfan93]

I just recently had a similar problem. The ammo I was using was blazer brass. The gun would fail to go into battery. Kept acting like the magazine was empty. I don't think it was the ammo because I had used 3 boxes previously. I bought 3 new magazines recently from CZ. I am thinking it may be the mags.

 

[Blind Bat]

YES, the problem can be with the Mec Gar mags especially if they are brand new. MecGar uses a greasey anti corrosion coating on their mag springs that needs to be removed or else it will attract dirt and cause feed problems.

I load my rounds fairly long (1.145") but some CZ's have tight/short chambers that can cause the rounds to hang on the rifling or a dirty chamber.

StangFan: Despite what some people might tell you, the problem you are experiencing is fairly common with CZs. Especially if using heavier rounds (124gr+) or rounds that are loaded on the long side. If you field strip the gun you'll probably notice some copper or lead on the bottom-front edge of the slide stop. CZ changed the design of the slide stops recently to prevent this problem. The old stops had a mini feed ramp designed into the slide stop the new ones are rounded off.

To fix this problem, try the things below a step at a time:
1. Clean your mags. DON'T use any lubricant in the mags. Maybe a little graphite but nothing more. If the spring is weak or getting hung up it can cause rounds to slide forward in the mag during recoil and they are getting stuck under the slide stop.
2. Call CZ and ask them for a new slide stop spring. This part has also been redesigned a couple of times over the years. You will probably need to pop out a small pin that keeps the spring in place.
3. Try changing mag springs. They could be getting weak.
4. Get a new style slide stop or file yours back. Don't worry about taking off too much metal.
5. Take a little bit of metal off the top of the slide stop where it contacts the notch in the slide to hold it open. This will now require the slide stop to move a little more before it catches the slide.

Usually, just cleaning your mags and replacing the slide stop spring will solve the problem. However, to make my CZ run 100% I had to do all everything. Although, I didn't buy a new slide stop, I just filed original down. Knock on wood, I haven't had the slide lock back prematurely in at least the last 2000 rounds.

 

[Ohio Gun Guy]

"CZ changed the design of the slide stops recently to prevent this problem. "

is recently 2008 - 2009?

I have a 2008 CZ75B....just wondering

I have shot Winchester white box and Blazer ammo with absolutely NO problems. I have 2 additional factory mags and they all work wonderfully.

 

[david_the_greek]

my cz pcr had a lot of failure to feed problems. I had bought new mags (factory) and was annoyed. I contacted cz and mike sent me a new spring to try in one of the mags and presto, eating all the junk I can feed it!

 

[armoredman]

How interesting, I don't remember seeing any slide stop changes myself, not since the famous slide stop breakage era of about 10 years ago. I would SERIOUSLY avoid filing any metal off a slidestop unless you are a qualified gunsmith. If you feel you need a new one, call 1-800-955-4486, press two for parts, ask for Adam or Justin.
Most likely re-manufactured overly long ammo. I can use sharp ogived bullets out to the max of 1.169, but most 115 grain JHP I keep from 1.083 to 1.122. I have had zero trouble with factory ammo in my CZs.

 

[goon]

If it's locking back with rounds still in the magazine, I've seen this before on a different gun.
The solution is take the slide off the frame and put the slide stop back in. Then put a loaded magazine and check to see how things are lining up and making contact in there. If the bullets from loaded rounds are coming in contact with the slide stop on the way up you need to file a little metal off the slide stop.

 

[Philo_Beddoe]

I have put 1000's of round through my CZ's, not a single malfunction ever.

Sounds like an ammo problem.

 

[Sunray]

Hi. CZ75's are extremely fine pistols. Would have had one when they first came to Canada in the early '80s, except they don't fit my hand. Too big. Sniff.
However, does the ammo feed with the factory mag? If it does, it's a mag issue. If not, it's the ammo.
It's not unusual for any semi-auto firearm to be particular about the ammo it shoots well and cycles. That's why, if you aren't reloading, you have to try a box of as many brands as you can to find the ammo your firearm both shoots well and cycles the action.

 

[railroader]

It sounds like the reloads to me if factory ammo works. To check if they are loaded too long take the barrel out of the gun and test some of the rounds. Drop them into the chamber and they should go in and out freely. If they are too long when you drop them in they won't seat right. If they are long and you push them in with a little force they will probably will hard to pull back out. Another thing if the ammo is loaded to light you can also be getting stovepipe type jams. Mark

 

[Blind Bat]

I remembered seeing something about a slide stop change on either CZCustom.com or the CZ Forum. I could be wrong.

Ninety percent of the time, the mag and/or slide stop springs cause the premature slide lock problem. My gun was still having occasional issues so I called Angus to order a new slide stop. He didn't have a slide stop for the 85 in stock and suggested filing some material off the top of the slide stop. Your mileage may vary. My gun made it through the rest of the IDPA season without a hiccup. I even stopped cleaning/lubing it for a month just to see if I could get it to malfunction which it did not.

 

[Halo is for Kids]

Just got a like new cz75b. Put 300 rounds through it for eval and had slide lock issues.

About 10 times out of 300 it locked back with rounds in the mag. Checked it out at the range and noticed the next round was hitting the slide release, locking back the slide.

Took some pics, looks like I need to get busy with a file or contact CZ. At least now I know why I got such a great deal on it. (looks like a cheap fix though)

 

[stangfan93]

The magazines I had ordered and used were brand new from CZ. I cleaned them up the other day while I was in the proccess of cleaning and rebuilding some Wilson mags.

Haven't had a chance to use them but I think I may go friday and see if anything has changed.


Thanks Blind Blat for your info. Much appreciated.