[cas]

Single stack... .45ACP I keep getting jams where the bullet nose is jamming into the rear of the barrel hood. Of course this never happens when I'm just shooting, it's always in a match where I can't stop to examine it in detail. Afterwards the cleared bullet always has marks where it's obviously hit the face of the barrel hood.

It does this with multiple magazines. I THINK it's done it with more than one style bullet (though I'm not 100% sure anymore)

Where should I look first? C.O.A.L. issue?

This post has been edited by cas: 15 November 2009 - 06:47 PM

[whatmeworry]

A picture or two as well as additional info (caliber, bullet being used, OAL, etc.) would help.
Adios,
Pat

[XRe]

Do you mean the barrel ramp? The hood is above the chamber, and therefore, a round can't actually dive into it...

[cas]

Dive? You said it, not me.

The hood, not the ramp.

This post has been edited by cas: 15 November 2009 - 09:14 PM

[G-ManBart]

XRe, on Nov 15 2009, 10:26 PM, said:

Do you mean the barrel ramp? The hood is above the chamber, and therefore, a round can't actually dive into it...

Did I miss something? He doesn't say it dives into anything...just that it jams into the hood. ????

[cas]

I suppose if I were holding the gun upside...

or

"transitive verb
1 : to thrust into something"

But since I didn't say dive... yeah, okay.

This post has been edited by cas: 15 November 2009 - 09:18 PM

[G-ManBart]

I'm not sure that it's terribly likely, but check that the extractor doesn't have a burr or sharp edge that's preventing the rim from sliding up behind the claw properly. If it hang there slightly and has just the right combo of mag feed lips and cartridge OAL it could cause the nose of the bullet to go too high and hit the hood. Usually they seem to work the opposite way, but it's still something to check. I'd make a couple of dummy rounds and see how things look while slowly hand cycling them. R,

[cas]

Based on passed experiences with short OAL's and the same problem, that's what I assumed it would be... and that would easily explain the one bullet. But not the others... and since the extractor on this gun is horribly ugly, I thought that it might be involved. I was thinking that if the case wasn't getting under the extractor, it would stay nose up and jam... maybe. I dunno, which is why I'm asking. lol

The extractor SEEMS to work okay, and the tension seems good, it's just ugly ugly ugly. (STI Spartan)

[cas]

Hmmm... I just learned a lot, and nothing at the same time. With no firing pin and the guide rod/spring removed I hand cycled about 8-9 magazines through, both slowly and briskly. With the "questionable" (possibly too short for the gun (though my SIG's and my Tanfoglio love them)) bullets, 98% of them didn't get under the extractor, instead the popped/jumped forward ahead of extractor.

With other ammo, a mixed handful of various factory JHP's 80+% of them did get up under the extractor and fed right. So apparently the length is a contributing factor, but not the only issue the gun is having? The shorter bullet is just exacerbating it?

Another thing I forgot to add to the original post was that probably better than half of the jams come during slide lock reloads.

[Hannu]

Have you checked firing pin hole in the breechface, it should not to have sharp burrs or something like that ?
What magazines are you using ? What bullet and col you use ? Do you crimp ? Is it a bullet, not the case mouth jamming to the hood ?

[Braxton1]

I can remember who it was (or else I would credit them), but one of the "name" 1911 pistolsmiths once told me that if the bullet "dives" into the feed ramp and won't go up-and-in, it's usually a gun issue (mag held too low by the catch, bad angles on the ramp, etc.), but if the bullet goes UP, then it is usually an ammo or magazine problem.

What types of magazines are you using? Is there a chance that the springs are a bit weak?

[HRider]

Try looking at the ejector. Since most of the jams happen from slide lock, it could be that the round is rubbing the underside of the ejector (if it has an extended ejector) and then flipping up when it comes out from under it.
Hurley

[cas]

After playing with this thing a while and really watching it, Im shocked that it works as well as it does. It also explains another occasional issue I was having with it not going into battery that last tiny bit. I'd been assuming it was ammo related, clumps of lube or lead shavings... but now I see that the extractor has had to snap over the case rim almost every time it goes into battery. No wonder it hung up now and then.

Thanks for the input thus far, Im going to try another extractor when I get the chance and we'll go on from there.