Still not extracting

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Rayleigh_Scattering

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I thought I had this licked, but not so. At least this time I had the good sense to take a photo before changing anything.

6E6B8884-7D66-4ECC-8D5C-16AD060C558E.jpg

A well-worn Corwin Arms 1st gen warrior semi. #6 2 3/4. First shot in a while. The empty shell came out part way. The bolt went all the way back to hold-open and stayed there. This happens every time with light rim shells and sometimes with heavier ones.

I can see the extractor scratches where it slipped off the rim.

The shell slid right out with a pinky-fingernail, so it wasn’t stuck.

Does anyone recognize these symptoms? Any suggestions what might be the matter?

I’ve polished the chamber, oiled everything up goldilocks, smoothed the barrel extension, and even soldered in a bridging rod over the part of the recoil lug socket under where the thing gets stuck.

I don’t know what to try next.

Any suggestions?
 

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Extractors seldom wear weak tension check the extractor spring may be to soft the extractor need to hold the case to the bolt face till the bolt travels far enough back to hit the ejector
 
Rayleigh_Scattering said:
I thought I had this licked, but not so. At least this time I had the good sense to take a photo before changing anything.

View attachment 623434

A well-worn Corwin Arms 1st gen warrior semi. #6 2 3/4. First shot in a while. The empty shell came out part way. The bolt went all the way back to hold-open and stayed there. This happens every time with light rim shells and sometimes with heavier ones.

I can see the extractor scratches where it slipped off the rim.

The shell slid right out with a pinky-fingernail, so it wasn’t stuck.

Does anyone recognize these symptoms? Any suggestions what might be the matter?

I’ve polished the chamber, oiled everything up goldilocks, smoothed the barrel extension, and even soldered in a bridging rod over the part of the recoil lug socket under where the thing gets stuck.

I don’t know what to try next.

Any suggestions?
Click to expand...


Time for a gunsmith, seems like it will have to be a good one. Either that or a new gun.
 
Don't know where the locking block locks. Front or rear of the barrel extension? If at the front check the locking block recess for any burrs or mi shaped metal that may be snagging the case rim on extraction causing the extractor to slip off of the shell rim. Had this happen on an old very worn 1100 Remington.

Darryl
 
rmsg0040 said:
Where would you get parts for a corwin arms shotgun. I never heard of that brand.
Click to expand...

It’s a generic Turkish semi, 2013 vintage. In spite of all it’s warts it is ergonomically perfect for me.

Kudos to the proprietor, by the way. He’s already helped me out with several other issues with it.

I’d love to pick up a parts donor for it, but they don’t come up often.
 
>clean/oil/gummed up

It’s sparkly clean and lightly oiled. I was out on a grouse tag so I had to put in the magazine plug (a short piece of 1/2” PEX), so I cleaned her all up and put on some fresh 10W40 while in there.

The extractor is sharp, and moves freely, although I have been tempted to see if I could fit a stronger spring.

The fired shell moves smoothly along the way with light fingernail pressure. It doesn’t catch anywhere.

>locking lug

That makes me think… See the trumpet shape of the rim of the partially extracted shell.

She is worn. If headspace on recoil was getting sloppy light base shells could move back and inflate their rims. That would change the pressure angle of the extractor on the front face of the rim and account for the scrape marks as it slides off.

Can some of you look at the rim of a few fired shells from your own 12ga and tell me if they are similarly coned out?
 
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After trawling google images for high res photos of fired shells (Found them on Etsy of all places) I'm thinking this is part of my problem. Usual fired shells have a bit of swell at the front but mine look like the low impedance end of a trumpet.

Next step is to make up some disc gauges to trace where the gap is coming from.
 
>parts

It’s an 1100 ripoff, but has no parts commonality with anything and neither I or the importer was able to get anything useful out of the manufacturer who is (near as I can tell) a Turkish crown corporation.

Corwin was able to set me up with some spare parts, but else than that I have to make my own until I can find a donor unit.

I like it, but If I ever buy another shotgun it’ll be a domestic model for which manuals and parts are available.
 
What condition is the extrator in? Does it have crisp edges and a good angle for capturing the shell rim? A weak extractor spring could allow it to slip off the rim of certain shells. And does the rim have a nice flat edge for the extractor to engage, or is it somewhat rounded?

As you said the gun fits you. One thing to do for certain is take its measurements for when the gun eventually dies. All the usuals.
 
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