CZ SP-01 Failure To Feed ?

[tpfishnfool]

Have had my spo1 for a year. Ran probably 2000 rounds through her.
Since new it has issues with feeding some rounds , not a brand issue, but seems it doesn't like the lighter 115 grain .
Is this a mag issue, spring issue or ?
Feed ramp and ejector seem fine, but kind of frustrated with a failure to feed on about 1-2 rounds per magazine .
My 97b has never had this issue.
Any info, or feedback is appreciated.

[Tok36]

Sorry to hear that you are having issues.

What ammo was it?

Have you tried different magazines?

What weight recoil spring do you have installed?

I have not seen many people have issue with 115g ammo in their CZs. Some of the heaver bullets with high shoulders appear to be the most common case of feeding issues cause by bullets.

This may not solve your issue but i make it a point to polish a factory CZ barrel feed ramp. Some of them come a rougher than others.

[baranski]

Could be reloads shot by a Glock with unsupported chamber, what ammo?

[tpfishnfool]

Sorry to hear that you are having issues.

What ammo was it?

Have you tried different magazines?

What weight recoil spring do you have installed?

I have not seen many people have issue with 115g ammo in their CZs. Some of the heaver bullets with high shoulders appear to be the most common case of feeding issues cause by bullets.

This may not solve your issue but i make it a point to polish a factory CZ barrel feed ramp. Some of them come a rougher than others.

Stock 10-18 rounds cz mags, stock recoil spring etc. gun is stock, no internal mods. Ran all the usual off the shelf ammo. Feed ramp is polished. Stock recoil spring as well.

[jcwatchdog]

Stock 10-18 rounds cz mags, stock recoil spring etc. gun is stock, no internal mods. Ran all the usual off the shelf ammo. Feed ramp is polished. Stock recoil spring as well.

Try a couple of regular 10 round mags. Sometimes the blocked mags cause issues. Not always but it's worth checking if you know someone who has a couple to test.

[Tok36]

Try a couple of regular 10 round mags. Sometimes the blocked mags cause issues. Not always but it's worth checking if you know someone who has a couple to test.

This^^

Being that your CZ is stock and was running well before these issues popped up, the mags are the first place i would look.

I do not run the factory 10s (Reduced capacity by shortening the mag body and lengthening the floor plate) from CZ anymore. Mostly because i do not like the look of the base plates. But i have encountered issues with 2 different factory CZ 10s. As jcwatchdog stated its only some of the time but it is worth checking.

I use the CZ Mec-Gar 10s from Greg Cote (blocked with a depression in the mag body that blocks the follower) or blocked free state mags generally.

[nahpungnome]

I'd say it's not the spring since it comes with an 18lb spring. Mine has a 13lb spring and it's been running reliably for over 2500 rounds. I'd also guess the blocked mag. I use 124gr and 115gr no prob.

Even before I sent it in to CGW, the stock spring had no problems handling 115gr. You said the feed ramp was polished, did you polish it yourself?

[81turbota]

I had a FTF in my SP-01 on Sunday. First one in ~1000 rounds.

I think it doesn't like the lighter grain stuff like you said. It has always been on a diet of Geco 124gr IPSC ammo, this FTF happened with Blazer 115gr. Odd because my Tactical Sports and 75b eat Blazer with no issue. I personally believe it was an isolated incident, possibly a weak round.

I hope you find your SP-01's cure!

[jinn707]

I'd suspect the mags first since the OEM 10 round mags have really terrible springs. If that doesn't do the trick, my personal experience has always led me to clean underneath the extractor - which looks like this:



I generally clean mine after 6 months or 5000 rounds, whichever comes first.

[Artsville]

If reloads CZs generally like a little shorter oal.......

Sent from my GT-P5113 using Tapatalk

[Tok36]

I'd suspect the mags first since the OEM 10 round mags have really terrible springs. If that doesn't do the trick, my personal experience has always led me to clean underneath the extractor - which looks like this:

I generally clean mine after 6 months or 5000 rounds, whichever comes first.

I forgot about this, good tip! I have seen a few different people fix FTF issues by thoroughly cleaning their extractor. It is surprising how much crap can be back there without being noticed.

[D.A.V.I.D.]

If reloads CZs generally like a little shorter oal.......

Sent from my GT-P5113 using Tapatalk

I've had the opposite experience, shorter rounds have had ftf for me. I mainly shoot 115 and haven't had problems with them in either of the SP-01's I've owned. Hopefully it's a quick fix.

[Big Ben]

If reloads CZs generally like a little shorter oal.......

Sent from my GT-P5113 using Tapatalk

+1. I was having a similar problem with my SP-01. After much finagling, I found that rounds with a longer OAL were rubbing on the front edge of the magazines. I assume that this was slowing the movement into the top position of the magazine just enough to screw up the timing and was causing the FTF problems I was having.

I now reload my 9mm rounds a little shorter. I'd have to check my reloading notes for the max OAL that works in my -01, but the change has completely fixed my issue.

Best of luck to you in figuring out the problem.

[maxxlara]

What kind of ammo have you been using?

[tpfishnfool]

Thanks guys, I'll check the extractor. The mags seem fine. Stiff springs .