Cz feeding problem

[mitch4570]

Maybe someone has an idea whats wrong. My cz 550 feeds great except for the last round. The last round always has the head of the case jump over the bolt. You have to pull the bolt back the forward to ger the last round in the chamber. It does not matter jow many rds you load. 2,3,4 or 5 always the last round jumps the bolt. What's wrong any ideas. 0.0

 

[RR 314]

Maybe someone has an idea whats wrong. My cz 550 feeds great except for the last round. The last round always has the head of the case jump over the bolt. You have to pull the bolt back the forward to ger the last round in the chamber. It does not matter jow many rds you load. 2,3,4 or 5 always the last round jumps the bolt. What's wrong any ideas. 0.0

Probably a weak magazine spring.

 

[mitch4570]

Seems like a weak spring would cause the case to not come all the way up in the mag well. These are jumping over the bolt. It has two mag springs in the rifle.

 

[RR 314]

Does it matter how fast it is cycled? Does the follower look to be in the proper position/tension on last round? A weak spring can affect the angle. A friend had a similar issue with a .416 and he swapped out the spring and it resolved the issues. This was back in the good ol' days when springs were readily available for $10.00. Are you using brass cases or nickel plated? I seem to recall Wayne/AHR recommended not using nickel plated brass. I have a .458 Lott that doesn't distinguish between nickel and brass. Have any surfaces of the extractor been polished? Two mag springs? As in someone doubled up two springs?

 

[Ontario Hunter]

I'm not clear exactly what is the problem. Is the case head not engaging the bolt face at all with last round only? Could be the follower or the spring. You can try adding some tension to the spring by removing it and manually stretching the leaves apart. If that doesn't help, the problem is with follower. Is it coming all the way up flush when bolt is open on empty magazine? If not, follower may be getting caught on bottom lip of receiver where it meets magazine box. Some trimming with Dremel grinder to eliminate abrupt edges may be needed.