CZ Shadow 1 Ejection Issues

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Gader04

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Folks,

Need some help on this one. I Shoot IPSC production optics division and have recently been having an issue with the occasional stovepipe. I have attached a picture below of what is happening. I have tried changing recoil spring, checked all my mag lips, cleaned and lubricated the pistol, Inspected both extractor and ejector.

Has anyone had this issue and what was your troubleshooting philosophy and fixes.

Any help would be much appreciated!

https://www.flickr.com/photos/143438049@N06/44853265665/in/dateposted-public/

dateposted-public
 
Check ejector, I had similar issues with ejector face being not square to the bore. Light touch with a file fixed it.
Another suspect could be weak ammo. Heavier slide with optics/adapter.

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I had a look at the ejector last night and it is definitely not square to bore. It has a slight worn angle towards the ejection port. Will Square off and see if it makes a difference.
Cheers
 
You have an Optic on the gun that has increased the total weight of your slide. You say you replaced the recoil spring. Was it a lighter recoil spring. A lighter recoil spring will offset the added weight of your optic and should resolve your problem. Also, hang onto the gun. Any rearward motion of your arms under recoil will reduce the effects of recoil on the slide. You end up with a double feed where the slide does not come back fast enough to eject the fired case before it picks up the new round.

If you have any doubt just remove your optic and the problem will likely go away. Put it back on and you run into the same problem. A lighter recoil spring should solve the problem.

Also I assume your gun is well lubricated.

Take Care

Bob
 
Canuck44 said:
You have an Optic on the gun that has increased the total weight of your slide. You say you replaced the recoil spring. Was it a lighter recoil spring. A lighter recoil spring will offset the added weight of your optic and should resolve your problem. Also, hang onto the gun. Any rearward motion of your arms under recoil will reduce the effects of recoil on the slide. You end up with a double feed where the slide does not come back fast enough to eject the fired case before it picks up the new round.

If you have any doubt just remove your optic and the problem will likely go away. Put it back on and you run into the same problem. A lighter recoil spring should solve the problem.

Also I assume your gun is well lubricated.

Take Care

Bob
Click to expand...

X2. Some good suggestions here from Canuck44 that will likely help you resolve issue.

Might also want to double check your thumbs are’nt Occasionally riding high on the slide. Had a couple similar stovepipe issues shooting my Walther PPQ in a 3 Gun match last summer and realized I’d inadvertently changed my grip and my thumbs were the probkem. Since paying attention to my grip and thumb position, surprise surprise, no more stovepipes.
 
Thanks for the input. I should have mentioned that I purchased the pistol used with the optic. I put about 1000rnds downrange before it started giving me problems. So the optic has been on it the whole time i have owned it. The problem has just cropped up in the last month or so. As far as the lubrication, it is well lubed. I have tried a 10lb, 13lb and 15lb recoil spring to and does not seem to make a difference. I will say that this shadow does not throw the spent cases very far. My other shadow ejects the cases over 6 feet away, this one will sometimes just get them out of the ejection port.
 
Gader the reason for it not throwing the brass very far is the weight of the optic causing the slide to run slower. I would go with the 10lb spring. I would also ensure I am not releasing my elbows as I fired the gun. Keep them straight or just slightly bent but firm. One way or another you are taking inertia off the slide ie it is not moving as fast as it should to eject the round. I had a Viper on my New Edition CZ Stainless using the dovetail mount and the slide cycled but not with much enthusiasm. The extra weight of the optic along with the optic mount does have an effect on the slide speed when using loads found in IPSC/IDPA competitions. Note I said lighter not light. By any chance are you running 147 gr bullets? If you are try 125 gr bullets at around 1,100 fps and see if that makes a difference.

Take Care

Bob
 
That weak ejection path is a big part of the story.

So is the ammo you are shooting the same as the first 1000 you started with? Keep in mind that it's not much of a step from "marginal but OK" to "marginal with occasionally frequent stovepipes". Also when was the last time you cleaned the chamber? A build up of fouling might be adding some drag to the cases coming out.

I ran into some issues with my stock Shadow using ammo loaded with older powder from an estate sale too. During the warmth of summer all was well. But the Fall cold brought on problems with that same batch. Shooting at a fairly warm indoor range immediately "fixed" the problem. So if your ammo is using powder that might be more temperature sensitive than some others you might want to save what is left of this batch and use it when the conditions warm up next year.

On the other hand prove this with your own process of elimination. With two Shadows you've got the ideal test setup. Try the same batch of ammo in both your Shadows on the same day. And if the gun with the optic is still weak and jams now and then remove the optic and try again. If it suddenly perks up and tosses them away like the other one there's your problem. And it'll require some working with the recoil spring to solve it. Due to the optic's mass you might need something lighter than the 10lb you tried. On the other hand if both guns show a weaker ejection on that cold day session then it's likely your ammo.

Apologies if you've already performed these "process of elimination" steps to get to this point. It's just that what seems obvious to some might need a reminder for others.
 
Thanks to everyone that replied! I will do some more troubleshooting and let you know how I make out and will post the remedy when I figure it out.
Cheers
 
I'd be swapping out the extractor spring as well. if the case is slipping off the extractor during the slide going back you will see this.
 
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