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Old January 12th, 2019, 10:45 PM #1
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First time shooting a new CZ-75- Question

Hey There,
i recently added a CZ-75 BD as my new range pistol. I did quite a bit of research and decided on this one. I cleaned the barrel as directed in the manual. I went to AGC with it this morning and it was pretty cold. About 27. Out of about 200 rounds I had two FTF jams and a FTE. Iíve read this is so rare so Iím just slightly worried. One item of interest is that after chambering a round, if I drop the mag to add another round, the next round ready to go has slid forward about 1/2 the distance of the mag lips. Used three brands of 9mm ammo and new factory mags.

At 25 yards my first 10 rounds were within 3 inches so Iím sold. Am I experiencing normal break-in woes in conjunction with the cold weather? Do the mags normally feed in manner mentioned?

Thanks in advance.

TAS
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Old January 12th, 2019, 10:56 PM #2
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Did this happen with all your mags or just one?

I own 5 CZ handguns and this has never happened to me.
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Old January 12th, 2019, 11:02 PM #3
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Seemed to be both. Also with 115 and 124..I contacted CZ already but I thought I’d ask around. .The thing i find odd as well is the mag and the next round moving partially forward.
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Old January 12th, 2019, 11:09 PM #4
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Different gun but aside from making sure the barrel of a new P09 was unobstructed, I put 250 rounds through it before I cleaned it. Probably not what most people would do, but didnt have a single issue.

Other than breaking it in with some more range time, I'm not knowledgeable enough to guess what it could be.
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Old January 13th, 2019, 12:23 AM #5
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Did the mags come with the gun, or were you forced to get them elsewhere?
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Old January 13th, 2019, 12:34 AM #6
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My sig p938 does the next round sliding forward every time. When I carry I drop the mag to top off after chambering, and I usually have to catch the next round in my hand because it gets knocked completely out of the mag. However, this does not affect feeding, I've never had a ftf with it.

I know, its a completely different firearm, just wanted to share that the sliding rounds might not be causing the ftf.
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Old January 13th, 2019, 01:01 AM #7
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The malfunctions are likely due to cheap ammo. What ammo were you shooting?

The dislodging of the top round in your mag is a partialfeed. This is a fairly common issue with new CZs. When chambering a round, the underside of the slide behind the breech face can drag on the next round at the top of the magazine. This can partially dislodge the next round from the magazine. The partially fed round may end up sitting with its nose at the bottom of the feed ramp and interfere with the extraction/ejection of the chambered round. In addition, the partially fed round can cause the magazine to hang if you attempt to drop the magazine. To alleviate these problems, the lower (leading) edge of breech face should be beveled and the underside of the slide behind the breech face should be polished. These modifications are shown in the following photograph (courtesy of Stuart @ CZ Custom Gunsmithing). The area to be beveled is shown in red and the area to be polished is shown in yellow.



Make sure you understand exactly what "polishing" and "bevel" mean in the context of gunsmithing. You can always remove more metal, but you can never replace it if you take away too much.
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Old January 13th, 2019, 07:24 AM #8
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Thank you sir.
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Old January 13th, 2019, 07:25 AM #9
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They came with it.
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Old January 13th, 2019, 08:10 AM #10
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i had same issue and tried different types of ammo. the issue is documented on the interweb, i put a link below. supposedly due to spring tension that loosens up after a break-in period. after about 500-600 rounds problem seems to have disappeared. not an expert on this but seems to be running well now after break in.

https://www.youtube.com/watch?v=FHrFeyAwjRs
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