Cause and cure , need some suggestions

[John1125]

This has happened about 4 times in like 500 rds. Load is 124 grn fmj Flat point by rocky mountain reloading . Loaded with 3.6 grns of titegroup. Length is 1.095 "

Happened in multiple guns with different mags . None of the mags are new , so I am thinking some extra power mag springs are in order .

What are the thoughts here ?

Thank you,

Kirk

[Joe Allen]

Mag lips may also be flared out.

[Scarlett Pistol]

Mag springs wear out at about 5k to 7k of rounds (less depending on other wear variables). With multiple guns and multiple mags I'd  guess the extra power springs are a good first try, especially since it seems like you shoot a bit. Give the mags a good total cleaning whole you're in there swapping things out.

[SI VIS PACEM PARRABELLUM]

So the same failure has happened with different guns and different magazines. Does this failure occur with any other ammo or just the one you listed?

[John1125]

So the same failure has happened with different guns and different magazines. Does this failure occur with any other ammo or just the one you listed?

I shot some Win. white box 115s but don't recall having an issue with that ammo . But also did not have the hammer springs that I now have. So I'm thinking slide speed is an issue - things going too fast .

[Earl Keese]

So the same failure has happened with different guns and different magazines. Does this failure occur with any other ammo or just the one you listed?

I shot some Win. white box 115s but don't recall having an issue with that ammo . But also did not have the hammer springs that I now have. So I'm thinking slide speed is an issue - things going too fast .

Wouldn't this lead you to look at the ammo as the issue? Easy enough to swap hammer springs to eliminate that as well, but multiple guns with the same issue when using the same ammo...

[Grendel]

ammunition profile or power.

[John1125]

ammunition profile or power.

Profile of ammo I could go with, but the empty  brass goes over 8-10 feet on ejection, so I don't think under powered on ammo.

The mags are 7-30 years old so new may springs are coming.

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[Grendel]

ammunition profile or power.

Profile of ammo I could go with, but the empty  brass goes over 8-10 feet on ejection, so I don't think under powered on ammo.

The mags are 7-30 years old so new may springs are coming.

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Weak recoil spring. This would also account for slow slide speed.

[1SOW]

Happened in multiple guns with different mags . None of the mags are new , so I am thinking some extra power mag springs are in order.

Indicative of bullet profile problem,  but I would also change the "old mag springs" with X-tra power springs" for the CZ mags.  .   Because it happens in multiple guns,  are you using the same mags in all of them?

Going up 1# on the recoil spring would shorten the case toss slightly and might  improve the feed.

[John1125]

I'm using the same mags in all three of my Cz 75s , I'll post a better pic of loaded round.

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[SI VIS PACEM PARRABELLUM]

I'm using the same mags in all three of my Cz 75s , I'll post a better pic of loaded round.

Sent from my XT1080 using Tapatalk

You need to clarify for everyone exactly what is happening here. Your original post states "multiple guns with different mags" now it's the same mags in 3 guns?? We can't help if we don't have the true facts. I'd still bet your ammo is the issue. That's appears to be the common thread.

[John1125]

I'm using the same mags in all three of my Cz 75s , I'll post a better pic of loaded round.

Sent from my XT1080 using Tapatalk

You need to clarify for everyone exactly what is happening here. Your original post states "multiple guns with different mags" now it's the same mags in 3 guns?? We can't help if we don't have the true facts. I'd still bet your ammo is the issue. That's appears to be the common thread.

Well here is the true facts as best as I can explain it . It happened in at least 2 different guns (75b and 75 transitional) , I was using the same three mags in those guns, I know that it happened using 2 of those three mags , that is why I said different guns , different mags - if that makes sense ?
  Sorry I'm not that good at articulating myself using a key board and not much better in person except then I can wave my hands . 








Thanks for the replies and help ,

Kirk

[Joe L]

Kirk,
Any chance those bullets need to be seated a little deeper?  Feed one manually and see where the bullet nose hits the feed ramp and then the top of the chamber as it is coming off the magazine.   I'm thinking perhaps adjust the overall length to compensate for the bullet shape?  Maybe someone with reloading experience with that shape bullet can help you. 
Joe

[John1125]

I've wondered about that also Joe, I just went with .010 -.015 short of the lands. The load shoot pretty good . I'm not married to this bullet , I'm going to try some others in the near future.

Kirk