Ejection Issues

[deafdogdief]

Have a Sig P239 .40. When shooting it ejects the empty brass plus a live round and chambers the next live round. No jams, just cycles three cases. Any ideas? It is intermittent and I will be getting in contact with an armorer, but I'd like to try some suggestions if anyone has any. Contacted Sig and it's prior to their lifetime warranty. Not interested in spending half the price of the gun to ship and update the gun, especially if there's more wrong with it outside of their update. Edited December 7, 2014 by deafdogdief

[Garufa]

Try a different magazine. 

[deafdogdief]

Try a different magazine.

I bought a new one to out in the lineup. Going to load a bunch of rounds and see if I can rule that out. Someone had mentioned the possibility of a feed ramp issue. Would there be a way to identify that by inspection?

[Oh Shoot]

I bought a new one to out in the lineup. Going to load a bunch of rounds and see if I can rule that out. Someone had mentioned the possibility of a feed ramp issue. Would there be a way to identify that by inspection?

 

Feed lips on the current mag are too wide? Compare them carefully.

 

Still seems pretty weird that it could do that at all though, really.

 

- OS

Edited December 7, 2014 by Oh Shoot

[Luke E.]

 That's an interesting failure deafdog! I'm just thinking though this really quickly without a gun in my hand as a visual aid but I would say to go ahead and rule out any feed ramp issue and there would only be one possible reason for the mag to be the culprit that I can think of off the top of my head. 

 First off, under normal circumstances a gun will only eject one case ( live or empty) per cycle of the slide. Any possible way that it's bouncing back enough to where it actually achieves to slide cycles from one shot? I seriously doubt that but hey, it's an unusual failure.

 Next would be the only mag failure I could think of, If for some reason the mag was spitting a round straight out the top of the mag(rather than having to be slid forward and up by the slide) it could, while the slide is in the rear most position after kicking out the spent brass, spit an unfired round out while the ejection port is still open. This would mean that the feed lips were flexed and spread open out of spec. If this were the case I would tend to think that the unfired round would not always clear, and get hung up some of the time but?

 Does it tend to happen when you have a fully loaded or near fully loaded mag? I ask because if the feed lips are spread open to far then it would most likely be most problematic when the mag was fully loaded since that's when it would be under the most pressure. 

 I'm surely interested to hear what you find the problem to be.

[Raoul]

+1 for a mag issue. I've got a Taurus 1911 9mm and one of the mags I have will do something similar.

Also a question...are you using manufactured ammo or reloads?

[deafdogdief]

That's an interesting failure deafdog! I'm just thinking though this really quickly without a gun in my hand as a visual aid but I would say to go ahead and rule out any feed ramp issue and there would only be one possible reason for the mag to be the culprit that I can think of off the top of my head.
First off, under normal circumstances a gun will only eject one case ( live or empty) per cycle of the slide. Any possible way that it's bouncing back enough to where it actually achieves to slide cycles from one shot? I seriously doubt that but hey, it's an unusual failure.
Next would be the only mag failure I could think of, If for some reason the mag was spitting a round straight out the top of the mag(rather than having to be slid forward and up by the slide) it could, while the slide is in the rear most position after kicking out the spent brass, spit an unfired round out while the ejection port is still open. This would mean that the feed lips were flexed and spread open out of spec. If this were the case I would tend to think that the unfired round would not always clear, and get hung up some of the time but?
Does it tend to happen when you have a fully loaded or near fully loaded mag? I ask because if the feed lips are spread open to far then it would most likely be most problematic when the mag was fully loaded since that's when it would be under the most pressure.
I'm surely interested to hear what you find the problem to be.

It's been a while since I've fired this thing because of the issue. Right now it's an expensive non carry boat anchor until it's solved. Not sure if it was a full mag or not. I'll be shooting this thing soon so I'll report back.

[deafdogdief]

+1 for a mag issue. I've got a Taurus 1911 9mm and one of the mags I have will do something similar.
Also a question...are you using manufactured ammo or reloads?

Factory only, anything I could find at the time. When I try this time it's going to be reloads.

[Luke E.]

It's been a while since I've fired this thing because of the issue. Right now it's an expensive non carry boat anchor until it's solved. Not sure if it was a full mag or not. I'll be shooting this thing soon so I'll report back.

I completely understand not wanting to carry it until you get the problem ironed out.
I've been sitting here with a pistol (unloaded) trying to come up with some other way that this could happen and really haven't come up with anything else.
Mom expecting that you'll find that this tends to happen with a full or nearly full mag and that a mag swap will cure what ails it. Again, I'm anxious to know for sure.

[deafdogdief]

I completely understand not wanting to carry it until you get the problem ironed out.
I've been sitting here with a pistol (unloaded) trying to come up with some other way that this could happen and really haven't come up with anything else.
Mom expecting that you'll find that this tends to happen with a full or nearly full mag and that a mag swap will cure what ails it. Again, I'm anxious to know for sure.

It's funny that you mention the magazine being full or not. I seem to remember that it was on the full side. Can't say for sure. Not a good feeling with only seven rounds in the mag to begin with.