CZ 75B Slide to Frame Question.


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gleaner26
December 26, 2010, 10:35 PM
Will the slide to frame fit become loose over time on the 75b or dose it stay nice and tight? If it dose start to loosen up how much play between the slide and frame are we talking about?:confused:

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HPJeep
December 26, 2010, 10:46 PM
Can't imagine it getting looser than a "normal" auto in which the slide fits on the outside of the frame versus the CZ's slide inside the frame. You'll get many thousands and thousands of rounds before anything remotely resembling loosening occurs. The CZ is an excellent design.

1SOW
December 26, 2010, 11:00 PM
My 75B has over 20K rds and is still tight and smooth--much smoother than new.

My Sig 239 rattles, but still shoots straight.

rbernie
December 26, 2010, 11:01 PM
I've put many tens of thousands of rounds through several CZs and never much noticed them getting 'loose' in any way. About the only thing that's ever really changed is the smoothing of the DA trigger pull over time...

Walt Sherrill
December 26, 2010, 11:47 PM
In theory, too, as the gun heats up with use, the slide will expand a bit.

That's probably more theory than reality, but I doubt that looseness of the slide is that big an issue in any case -- as barrel to slide fit is far more important to accuracy if you're using the sights.

schmeky
December 27, 2010, 09:26 AM
My CZ-97 frame to slide fit hasn't loosened to an detectable degree after several thousand rounds, however, the slide/frame movement has become extremely smooth.

I have done a lot of cutting on CZ frames and slides in my mill and I can attest to the quality of steel used in CZ pistols. Plus the slide rail design is generous and extremely well cut and smoothly finished.

For the money, I feel the CZ slide/frame execution and design is one of the very best available.

gleaner26
December 27, 2010, 10:42 AM
Good to hear. Thanks for the quick replies.

easyg
December 27, 2010, 12:55 PM
For the money, I feel the CZ slide/frame execution and design is one of the very best available.
I don't think that the slide/frame will loosen much over time.
But I personally don't care for the slide-inside-the-frame design of the CZ.
It makes racking the slide more difficult than most pistols that I have used with the slide-outside-the-frame.
And so it makes stoppage drills slower.

herbie1
December 27, 2010, 09:29 PM
How loose is loose?

What is the disadvantage if it loose?

Every semi-auto slide that I have is loose. Many are loose enough that I can make it rattle a bit if I shake it side-to-side. My CZ is one of the loosest.

My guess is that accuracy depends more on the barrel to slide lockup than the slide to frame fit? Am I correct on this?

H.

1SOW
December 27, 2010, 09:40 PM
easyg: A good fitting well oiled CZ75 slide feels like it's on ball bearings.

Are you racking the slide with your weak hand 'fixed' , on top just ahead of the rear sight, and pushing forward sharply with your strong hand? I have Guns with the common rails and I'm faster TRB with the CZ 75B and my son's Shadow; but then I shoot them a lot more than the others.

Herbie1: How many rds through your CZ and which model/caliber is it?

Walt Sherrill
December 27, 2010, 09:48 PM
Every semi-auto slide that I have is loose. Many are loose enough that I can make it rattle a bit if I shake it side-to-side. My CZ is one of the loosest.

That's the FIRST TIME I've read that about a CZ slide. Loosest!? Really unusual.

herbie1
December 27, 2010, 10:00 PM
Yes, it is that loose.

It is a 75b SS Limited Edition.

I suppose I could clamp the frame in a vice a give it a squeeze, but I'm not sure I want to Muck with it like that.

My p89 and 92f are almost as loose. My G26 is a bit tighter.

Neither of them have more that a couple thousand rounds (except the p89 which I bought used and I don't know the round count) .

Like I suggested previously, I would think accuracy depends on the barrel to slide/sights fit, not the frame.

BTW it seems that the p89 has the tightest barrel lock-up (at front of slide), followed by the G26, CZ75, and by far the loosest barrel is on the 92f.

The smoothest slide, for what that is worth, is on the 92f, followed by the CZ, Glock, and by far the roughest slide is on the p89.

Sorry for the distraction, but I would re-ask the question, what is the issue if the slide is loose?

H.

1SOW
December 27, 2010, 10:39 PM
I'd 'call' (vs email) CZ USA unless you bought it at the Custom Shop--then I'd call them.

You would have to send it in on their dime probably.

Looseness is 'subjective' if there are no failures or problems, so in general--it's not a common CZ problem area that I've read/heard about.

easyg
December 28, 2010, 12:38 AM
easyg: A good fitting well oiled CZ75 slide feels like it's on ball bearings.

Having owned a CZ 75B 9mm and a CZ 75B SA .40, this has not been my experience at all.
A good fitting and well oiled CZ75 slide feels no better than a good fitting and well oiled XD, Ruger, Glock, or Sig.
In fact, there's more drag with the CZ slide than the Glock IMO.
Probably because there is more metal-to-metal contact with the CZ.

Are you racking the slide with your weak hand 'fixed' , on top just ahead of the rear sight, and pushing forward sharply with your strong hand? I have Guns with the common rails and I'm faster TRB with the CZ 75B and my son's Shadow; but then I shoot them a lot more than the others.
I've used both the "sling-shot method" and the "overhand grasp method" and the CZ is slower both ways.
There's just not as much slide to grasp when compared to pistols such as Glock, HK, Sig, Ruger, SA XD, and S&W M&P.

Gary G23
December 28, 2010, 12:48 AM
My high mileage CZ 75B SA loosened up. The fix is to peen the slide rails.

1SOW
December 28, 2010, 01:10 AM
Easyg: Both guns I shoot the most have been worked and have light springs (including an 11# recoil spring in the 75B). They are easy and fast to rack. With the stock 14# spring, the slide is still smooth but also stiffer. The slide surface to 'grasp' is smaller, so the overhand grasp using the rear site as a 'stop' works best for me.

I've used the XD Service 45 and the Sig 239 quite a bit, but they have the stock springs and the slides are both 'stiffer' than the CZs.

I don't work for CZ. I do like all four guns for what they do best.

goon
December 28, 2010, 01:41 AM
One of my friends used to work at Wilson Combat. He told me that with stainless you have to allow a little more slop than with carbon steel because otherwise the slide will start to "gall" against the frame. That may be why your stainless CZ has a little more play.
FWIW, my brother's 9mm 1911 is one of the loosest semi-autos I've ever shot. It rattles noticeably when shot. Everyone who picks it up shoots it like an expert and it's deadly accurate.

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