Weird jam

[svandamme]

I've had this a 2-3 times now.
It seems to happen with reloads 230 grain ball , 6.6 grain VV N340.
As i'm shooting, round fires, nothing noticibly different, a new round chambers, but the slide does not go completely go forward.
Can't put on the manual safety because the slide is not forward as i should.
the hammer is fully cocked, trigger won't budge because slide is not forward.

But the barrel/slide seems locked, there is no gap between rear of barrel and slide.






The really weird thing, is that the slide is then very, very tight, i can hardly rack it to eject the round. It takes quite some force to cycle it again.

And if i then load some factory ammo after the failure and let the slide close with the slide release. Or i rack the slide, the new round chambers, but i get the exact same issue. Only when i rack the slide a few times empty does it go away.

I've since stripped the gun completely, could not find anything wrong , can't find any odd wear or marks.. It's just a weird occurance..
Now i could accept something in my loads was wrong, but i have a hard time understanding how this failure happens and as such what would be wrong with the load.
Did not feel like a hot load, and did not feel weaker. Even if it was weaker, how would it cause this jam?

[douglas_knott]

Check your crimp. Keep it lubed up.

[Hoss in IL]

I don't know , he said it does it with factory ammo too. That's what threw me. I can see the re-loads making him have hiccups but not the factory ammo. I think it's not an ammo problem but I'm in no way qualified to suggest a fix.

I was going to suggest that Dave will probably diagnose it for him

On the rare occasion that I have a failure to return to battery with my re-loads, I can just bump the back of the slide with the side of my fist and it goes into battery.

[svandamme]

It's lubed with FP10 every 100 rounds
Crimp seemed fine, once the jam cleared i re-fed the round that was in the chamber when it initially jammed.. The second time it went through without a problem.. really weird.

Previous time, i had this issue, i got the round out
retried with another round from the same batch, same problem
got the round out again
put in a snap cap , no problem, hammer fell on the snap cap
got original round in a gain, same problem re-occurred
snap cap back in, no problem , hammer falls
Got a factory round in there, same problem again
out with the round
racked the slide a good 5 times without letting it slam on an empty chamber to badly..
loaded the factory ammo, gun fires
then i ran 3 mags of factory ammo , rapid fire, no problem
in with the original round of the 1st jam, goes through without a problem

i'm like huh?!

[svandamme]

Originally Posted by Hoss in IL

On the rare occasion that I have a failure to return to battery with my re-loads, I can just bump the back of the slide with the side of my fist and it goes into battery.

I've had it fail to battery with the cheap mec gar mags a few times
When that happened there was a visible gap between the breech face and the barrel. And in those cases i could bump it shut

This is different, as the slide does not want to move, it's feels very stuck , needs quite some effort to release.
And there is no gap at the barrel / breech face

[Sheepdog]

Lube it very well with a heavier viscosity oil like FP 10 rack slide 200 times. See if that solves the problem. Run it very wet. The tight tolerances sound like the problem.

[svandamme]

But i am running it very wet with , with FP10...Have done so from the start
In fact, every time i am done shooting, i need to wipe it clean because when it warms, the fp10 come out the sides.

Just took the slide off, it's still wet, that's how i put it away after shooting:
pic doesn't do it justice, that's pretty wet

[douglas_knott]

Sorry Terry I guess I missed the part that it happened with factory ammo too.

[BadOscar]

Originally Posted by svandamme

I've had it fail to battery with the cheap mec gar mags a few times
When that happened there was a visible gap between the breech face and the barrel. And in those cases i could bump it shut

This is different, as the slide does not want to move, it's feels very stuck , needs quite some effort to release.
And there is no gap at the barrel / breech face

This sounds like the extractor is too tight. Too tight can cause it not to go fully into battery and also make it very hard to eject a live round.

[Dave Waits]

something else to check is the length of your cases. No longer than .898". Also, you may want to take a 357 case, inside champher it til the edge is sharp and scrape out the headspace ring.Sometimes, especially if your cases are shorter than the ring, crud will build up in the headspace ring(45ACP and all Semi-auto cartridges that're straightwalled, headspace on the case-mouth).

Another thing, how many rounds on the Recoil spring?