CZ-75b STILL jamming.

[Hammerhead6814]

After replacing the old spring, which was blackened like a chicken on a grill for five hours, and thoroughly cleaning the extractor well, I am STILL getting jams. It's nowhere near as bad as it was. With the old extractor my 75b shot like a bolt-action. I can get through the odd magazine now, but give it time and it will jam.

The most common type of jam is where the spent cartridge does not even leave the chamber. It's like the extractor never even engaged it. The second is where the shell makes it half-way out of the ejection port and then gets stuck between the barrel and slide, I'm pretty sure that's called a stove-pipe.

Should I replace the whole extractor or take it to a gunsmith?

[Cesar]

Check the claw on extractor, it may be broken since it doesn't take cases out from chamber.

[Grendel]

All ammo, and with all magazines? reloads or factory ammo? Was the gun used? Have you changed the recoil spring?

The 2 commonest causes of FTE are (after eliminating underpowered ammunition and bad brass as a cause) bad extractor/spring or a weak recoil spring causing low slide velocity. Sometimes a weak magazine spring can cause a round to either slip forward missing the extractor on the way up, or not pushing it high enough for the extractor claw to grab the rim.

[Cesar]

I think weaker recoil spring would actually provide less resistance to slide moving back thus - higher slide velocity.

[Grendel]

I think weaker recoil spring would actually provide less resistance to slide moving back thus - higher slide velocity.

You're right, I'm thinking of a failure to feed. The weak spring means the slide is slower coming back into battery, causing either a nose up jam or a nosedive into the feed ramp.