The Original CZ Forum
CZ LONG ARMS => CZ SHOTGUNS => Topic started by: Davila0115 on November 14, 2012, 11:53:55 AM
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I bought a never been shot CZ 712 target from a friend. He bought it in 2010, and it just sat int he box with the socks covering the guns still and everything. I took it trap shooting a few times. and when it fires, its a great shot.However a few times, I get a shell that wont fire. I will pull back to eject the shell, catch it, and inspect it. The shell has a small faint hit on the primer from the firing pin. But it did not go off. Sometimes i can put that same shell back into the gun and try and fire again. sometimes it will fire. sometimes it wont... i have tried to hit some shells 3+ times. leaving 3+ unique marks on the primer... and no luck firing it.
I have tried 3-4 different kinds of ammo. including reloads someone gave me at the club. Anyone have any suggestions what could be wrong with it?..
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I'm no gunsmith, and I know very little about semi-autos, but it could be a slightly out of spec firing pin or maybe a bad spring. A thought though....Have you tried the cheap Winchester bulk ammo? That bleeped stuff is NOTORIOUS for soft primers which produce pierced primers and "drag marks" in the Huglu break action guns. That stuff just might run perfectly in your 712. If that doesn't help, I'd suggest calling CZ-USA.
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I took it all apart last night, the pin comes out of the bolt i would say approx 1/16th of an inch?... the firing pin spring looked good. and i worked is the pin in the bolt for a good amt of time and nothing out of the usual seemed to be present... i haven't tried that ammo in this shotgun, but i have used it in others in the past.
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Don't know what the specs on firing pin protrusion are for the 712, but I can tell you that as little as a couple of hundredths of an inch can make all the difference. You'd need to measure it with a micrometer I think it is. Try that Winny ammo. Usually available in Wally in bulk packs. If that doesn't solve the problem, you'll need to call CZ or see a local gunsmith.
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Has it thoroughly been stripped, cleaned and lubed prior to your firing it?
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It had never been fired, prior to me firing it. and not thinking about it sitting for 2 yrs untouched. i did fire it.. i when i fully striped it down last night for the first time ever in it lifetime. it seems in my opinion to be over oiled. i could see my finger prints in the oil residue... but everything was moving freely, and was not totally filthy. Before i reassemble the gun later this after noon i am going to spray it down with some gun scrubber, and a light mist of rem oil... but was waiting to see if i could pick the forums brain a bit first...
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My BAD! I should have thought of that!!!!
These guns come from Turkey and are packed with a lot of "goop" to protect them in the boat ride and while sitting on the shelves waiting to be sold.
Give it a VERY THOROUGH cleaning and a light oil. Might solve everything.
Thanks for the reminder 777TRUTH.
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Will do i will def give that a try later. and let you guys know how it went sometime Friday. I will be going trap shooting with it tomorrow afternoon... Thanks for all the help.. If there is anything else you guys can think of let me know plz. Thanks much!
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I'd be willing to bet that removing the packing grease will solve all the problems.
If possible try to stay away from the Winchester Target (I believe they are marketed as UNIVERSAL at Wally World) loads and the Pink Federal (Breast Cancer) loads till she is broken in properly.
Regular Federal and Remington Gun Club target loads should be fine.
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So i just got done trying the gun out again. and once again it acted up. This time i used a box of Diana trap load shells, and a box of remington gun club target loads. Both gave me issues. I cleaned the heck outta this gun. everything looked in perfect working order. I need to find a number to call CZ-USA, and ask them about it. Also i am not quite sure what to do about the warranty since i bought gun from a buddy. And i dont know if he has the original receipt... so I am kinda screwed here... any more suggestions plz let me know. Thanks everyone!
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Call them tomorrow and explain the problem with the gun. It sounds like something is up with it. From what I've heard, CZ is pretty good about taking care of people in this situation. I doubt they expect you to produce the original receipt or anything like that. Let us know how it turns out!
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having the same problem as you describe here with my CZ 912 shotgun. Did you ever get a resolution? Thanks.
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Hi,
i know that i have not posted on this forum before, but i have been quietly 'lurking' in the wings.
Im almost sure that your problem stems from the fact that your gun is circa 2010, and i recall reading about firing pin problems from that time period-the newer models do not seem to have this problem anymore.
i came across this information, due to the fact that, i myself will be buying another shotgun very soon, and i have boiled it down to two Turkish models (one is the CZ 712), hence the heavy research.
So as advised, contact CZ and get it replaced.
Good luck.
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I have a new Upland ultralite 12 ga and noticed that my bottom barrel firing pin hits a little shallow on the primer. I haven't experienced a ftf yet but it is visually obvious that it doesn't strike as deep as the top pin. I hadn't thought about cleaning it. Been a little reluctant to pull of the stock but guess I had better, and check the springs and see if there is any build of grease or oil build up from the factory. I will post again once I clean and check it out. So far I have put maybe a hundred rounds through it. Love the way it shoots. Cheers.
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Well, I cleaned it and that stopped the problem for now. It must have had some built up gunk from storage. Full thumbs up. Thanks guys.
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I bought my son a 720 Youth to use for trap, we had the same problem with intermittent light strikes for about the first 50 rounds.
Now we have a couple of hundred rounds downrange, and haven't experienced the problem again. I did clean it before firing, but didn't detail strip the bolt. I don't know if it had some grease in there or what, but it seems to have gone away with some break in.
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update anyone?
Well here... have this.
http://www.migunowners.org/forum/showthread.php?315854-!PIC-HEAVY!-CZ-712-Light-Strike-*SOLVED*-!PIC-HEAVY!
Plagued with a common issue, the CZ 712 is well known for light strike issues. A simple search engine query results in a considerable amount of references to firing pin protrusion issues. My 2013 CZ 712 (identified by the first two numbers in the serial, i.e. "13XXXXXX) is no exception and has light struck many of my reloads which tend to have a deeper primer seat. This is a major concern for me since I require each of my guns to perform equally as well.
Although there are many of these references, none have actually explained why or how this light strike occurs. Some have noted CZ gunsmiths referencing early, circa 2004 and older models, having Out Of Battery ignition due to a firing pin design flaw. I noted in my online research, that a recommendation of .050 to .060 should be fine but this was on a CZ double gun and is less than my factory protrusion length. Ill need more pin in my situation.
The original, dangerous firing pin is identified by its physical taper and silver/chromed color, while the newer version has a straight, non-tapered shape with a brown coating. If your CZ 712 has the old style firing pin, its advised that you call and schedule a send in for replacement. *If you have the newer style and are experiencing light strikes, you may need some "tuning" of your bolt body and locking lug.
Here is the fix including a description and pictures.
PLEASE FOLLOW LINK TO MY HOME FORUM FOR FULL THREAD. THANKS -t79d