CZ 75 SP-01 Shadow Failure to Feed FTF

[Ludde]

Can you guys please help me diagnose my Failure to Feed issue that I witnessed today during practice.

The rim of the case did not rise up and under the extractor.

I shot roughly 150 rounds prior to failure and another 200 after it without any failure what so ever.

Gun was thoroughly cleaned and extractor w. spring was replaced prior to the practice. I changed the extractor since during my last match I got a failure to eject and also during an recent practice.

Facts,

CZ 75 SP-01 Shadow

11 lbs recoil spring (CZUB) used for ~10k

13 lbs main spring same usage

New extractor & spring (changed before practice)

Regular SP-01 18rd mags with springs that have been used for ~15k

Chamber is nice and shiny.

Factory ammo.

The new extractor does not bind or feel rough during the loading action, not even if I slowly assist the slide forward when loading. Everything is smooth.

Can it be that the mag springs are getting old?

Can it be that the recoil spring is getting old?

Can the extractor be sitting to shallow, need to remove some material from the extractor "depth pad"?

Combination of above?

I do not think that I bumped the slide stop lever, this might induce problems during slide reciprocation. I've had problems with that earlier due to really high support hand grip.

The attached picture of the recoils spring is old vs new (11 lbs czub).

[Sliv2]

Recoil and mag springs both need to be changed. Try that and diagnose from there.

[cheby]

I change recoil springs every 4K.

[Jay870]

Recoil spring is definitely due for replacement.

Also, if that is a pic of the actual failure I would be looking more at the magazine than the gun. Clean the mag, replace the spring, check the feed lip dimensions.

[GForceLizard]

Get you some +10% mag springs

[thompsoncustom]

I agree looking at the pic I would think mag springs.

[TennJeep1618]

Get you some +10% mag springs

This solved all of my CZ feeding problems.

[Ludde]

Thanks for the reply.

I've now changed recoil spring.

The mag was newly cleaned prior to shooting.

I will order some +10% mag springs and hope it works.

Edited August 3, 2016 by Ludde

[mjmagee67]

Are you sure it's not something to do with your ammo? I've had a stoppage or two and the cases had bent rims. I reload range brass to the tune of a 1500 or so a month.

[mjmagee67]

Double post again.

Edited August 3, 2016 by mjmagee67

[Ludde]

Now I've shot the match with the gun after maintenance.

 

I replaced, recoil-, trigger-, sear- & magazine (+10%) springs.

I also managed to get the trigger not to reset fully all the time prior to the trigger return spring change. It was extremely worn and light.

 

Now I've shot a couple of matches with it and it runs great. The main contributor to the FTF issue where the mag springs.