Cooey 750 failure to extract

maple_leaf_eh

maple_leaf_eh

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I have a Cooey 750 which loads, fires and fails to extract. Its got family background so I can't just ditch it. The visible motion of the extractor is to engage the rim on closing, but as soon as the bolt handle lifts, it rides off the rim. I've soaked and cleaned the bolt face and channel, so I'm sure there are no physical obstructions. This looks like an extractor that doesn't want to do its job. It is some form of casting. Part of the claw's edge looks deformed.

What are my options? New extractor? New bolt complete?
 
Make sure it looks like this and isn't rounded.

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They're not that easy to remove if you're thinking of trying to get dremel it a bit.
But can be done with care.

I did get a few from Western Gun Part last year, you could try them.
 
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Try and bend/tweek the extractor to make it work... it worked at one time...maybe sharpen up the tip to grab the rim better. Lousy design. Often one would break a few trying to install them until you got the 'knack'... or if the heat treat was off they would simply bend. Lousy is the best description.
 
I have had some success with a change of ammo when these rifles started showing signs of poor extraction.Winchester .22 cases had more of a "square" shape to the front of the rim than most other brands, giving the extractor better purchase on the case. I don't know if current lots of Win. are still the same though, however it might be worth a shot (so to speak) to look into this. It isn't a long term fix by any means,but it worked till the ext. was really worn out. Might get you shooting again till you can find a new one. .....catnip
 
There is strong resistance on the case as I snick it out with an edged tool, so I might try solvent cleaning and rotary polishing the chamber first. I read another post about Cooey extractors and bad outcomes. Thanks for the prompt replies folks!
 
That is interesting.
Hmmm, maple_leaf is a 'live round' a little difficult to extract too, even if it isn't expanded?
Could lightly 'blue' the brass on a couple rounds, and see if the come out marred in the same spot.

Had to rotary polishing a new 22 Zastava to help with extraction, it did help.
 
HuskyDude said:
That is interesting.
Hmmm, maple_leaf is a 'live round' a little difficult to extract too, even if it isn't expanded?
Could lightly 'blue' the brass on a couple rounds, and see if the come out marred in the same spot.

Had to rotary polishing a new 22 Zastava to help with extraction, it did help.
Click to expand...

I don't think Cooey Model 750s have been made in 40 years, and this one is used. Too much dry firing? No. The breech face is solid all around where the firing pin which is also the ejector would engage. If anything there is a conical thinning at 3-o'clock where the extractor engages. There is some scratching on the outside where others have dug around with tools. The previous owners were not sophisticated gun technicians, more farm machinery mechanics prone to reaching for a bigger hammer if there was resistance.

I have not tried extracting an unfired round, only fired cases. The extractor consistently jumps the rim - of that brand. I only had one box with me at the range, and will try others next outing. I like your idea of dye marking or felt pen painting to look for trends.

I asked an acquaintance about abrasives, and we agreed even my finest grade of emery cloth is going to be too aggressive but a wad of steel wool might not do much of anything. I have some JB Paste and will spin an oiled patch with the grit in the chamber. Failing any change, I would consider removing the barrel to get closer to the breech face.
 
Think before going too far I would just try a polishing compound.

Have a few tubs of Autosol lay'n around. Stuff works very well.
But can get expensive on bigger jobs.
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Few years back found some Farécla (F-rek-la) G6 compound.
Thus stuff works on everything. Amazing !!
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