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Discussion Starter #1
Have an old 12 ga pump that hangs up/sticks after firing and will not eject the spent shell. Unfired shells cycle perfectly. What component could be responsible for this?
 

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A dirty or damaged chamber?

What is the age, make and model?
 

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That sounds like an old Savage 12 ga pump to me. I had one that hung nearly everytime. It was chambered 3", but it never liked anything but the length it would try to cycle.

You can see what happens with 2 3/4", then try 3", depending on the gun, one or the other may work.
 

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Could be:
That there is a "burr" on one of the action rods (does it have 2 or 1).
That your gun has a tight chamber and that you are using shells with aluminum bases and they are over expanding when fired thus getting stuck in the chamber.
The gun needs a good cleaning and kept LIGHTLY oiled.

Keep us up to date on how this turns out.
 

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Discussion Starter #5
Thanks guys, it’s an old Higgins that I inherited that never did work well so it was stored and I just pulled it out of the case, disassembled, cleaned, oiled and reassembled. I did not see any damage or burrs and it does feel like the case is expanding. I have not used this gun for obvious reasons but now would like to have it functioning properly. Have to give it a good pop on the ground to eject the spent shell, I will disassemble again and inspect closer.
 

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Just an FYI. Most old JC Higgins were actually High Standards. Higgins may have also put it's brand on some Winchester Model 12s.
Beat me to it. The mod12's have a disconnect that the slide has to move forward(usually during recoil) in order for it to cycle. I've got a couple that sometimes you have to push forward on the slide to get it to cycle.
 

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My Ithaca 37 did that a few years ago after working great for 40+ years. I removed the barrel and cleaned the chamber real good and fixed it. Must have been plastic or powder fouling?
 

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I have a Higgins which sometimes will leave the spent shell in the chamber, just doesn't grab it when I cycle the pump action. Never tried to solve the issue as I don't carry it anymore. Interested to hear what you discover.
 

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Discussion Starter #11
I looked it over at lunch and can see no bent rod, burrs or debris. Lightly rubbed some steel wool where the case meets the chamber, tried a spent aluminum shell and it snapped into place and had to be pried out with a small screw driver. It came out with a lot less effort than when it was freshly shot so I think something else is occurring. The bolt did have a ridge on the top in the 10 and 2 o’clock position which I lightly buffed out with 600 grit.
The point about cycling forward is interesting and I will look at that later. Is the disconnect on the discharge side (right) side of the frame?
Heading to camp tonight for a few days so probably won’t shoot it again until tomorrow afternoon.
If anything else comes up I will check back in,
Thanks guys
 

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Is this only happening with aluminum base shells as opposed to brass based shells?

I have seen some guys have problems when shooting shells like Remington Gun Clubs. It is not common but it does happen.
 

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Discussion Starter #14
Okay, so the extractors seem to function under spring pressure so I don’t think it is that however the problem is not that the shell won’t extract when the action is opened - it is the action won’t open.
I have not tried different shells yet but years ago when I tried to use this I had high and low brass shells doing the same thing - probably why it has been stored in the back of the cabinet for so long. I will grab a couple other shells to test with.
 

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Okay, so the extractors seem to function under spring pressure so I don’t think it is that however the problem is not that the shell won’t extract when the action is opened - it is the action won’t open.
I have not tried different shells yet but years ago when I tried to use this I had high and low brass shells doing the same thing - probably why it has been stored in the back of the cabinet for so long. I will grab a couple other shells to test with.
Data point; My Win Mod 12 (made in 1929) requires that after firing the pump must be forced forward before it can be drawn backward to work the action of the gun. FYI....
 

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Is this only happening with aluminum base shells as opposed to brass based shells?

I have seen some guys have problems when shooting shells like Remington Gun Clubs. It is not common but it does happen.
Like I said before.......... Aluminum vs brass; the aluminum sometimes expands a bit more causing stuck cases....
:kiss2:
 

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Discussion Starter #18
So here you go, not sure which one in particular helped, maybe a combination of a couple.
I followed up on the slide release comment and it is actually part of the trigger mechanism, which I totally overlooked twice. This piece had a good size burr on it, filed that off and just shot a dozen mixed shells through it with no stuck cases. Used aluminum, low brass and high brass mixed together. Surprisingly no problems.
I think the thorough cleaning helped but the slide release burr was the main culprit.
Thanks all for your assistance. Hate to see a good old gun just sitting around collecting dust. Now this will be repurposed.
 
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