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I recently had a local gun shop give me a Cooey Model 75 single shot bolt action 22 rf rifle. It would not extract and the shop didn't feel that the rifle was worth putting any time/money into it. Aside from that issue it is in very good condition with a bright bore and about 80% bluing. Upon further investigation I found that the extractor had been replaced. The new extractor however still had parting lines from the investment casting process. The angle on the nose was way too acute causing the hook to ride over the rim of the case. While the material seems springy and semi hard, it was still soft enough to face the surface down with a mill file. By working gradually and checking the progress as I went, I was able to increase the angle on the face to make the extraction/ejection reliable. Would it be wise to remove the extractor to harden then temper it? Somewhere along the line, the hole for the extractor has become enlarged and that required using red loctite to keep the proper angle/tension on the extractor. R/Ring the extractor has some risk to it. Replacement extractors are not available and I'm wondering if I should leave well enough alone. GOOGLE HOTLINK FIX FOR BLOCKED PHOTOBUCKET IMAGES https://chrome.google.com/webs...inkfix=1516144253810 | ||
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Just make a new one from a piece of 4140 PH, which usually is 28-32 R C. You can't PROPERLY harden and temper mystery metal. I am assuming that the extractor uses a separate coil spring? | |||
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The complicated shape of the Cooey extractor would make fabricating difficult, hence the investment casting. It is not a flat piece of metal. No spring. the tension is built into the shape of the extractor.  Investment cast lock parts for muzzleloaders are routinely hardened. GOOGLE HOTLINK FIX FOR BLOCKED PHOTOBUCKET IMAGES https://chrome.google.com/webs...inkfix=1516144253810 | |||
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OK, well most springs and long claw extractors are made of AISI 1090ish (lumped in and called spring steel) high carbon steel. If you know what that casting is made from (assuming it is high enough carbon content) yes you can heat treat and temper. If you don't you can only guess. It will probably fail, either break or yield as in permanently deform if you get it wrong. Seeing how someone is making castings for this part, I bet it is prone to failure. | |||
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It seems pretty stiff and springy given the force necessary to deflect the shape to get it into the bolt recess. It wasn't dead soft requiring quite a bit of file work to remove a small amount of material to get the proper angle on the nose. Might it be hard enough? I can get a new bolt (less extractor) and the missing sight elevator for $39 shipped from Numrich. I'm going to order them this payday. Less than $40 and some time seems to be a reasonable investment. These rifles have a reputation for accuracy and were very popular in Canada at one time. Winchester took them over and they have gotten lost in the corporate shuffle it seems.  GOOGLE HOTLINK FIX FOR BLOCKED PHOTOBUCKET IMAGES https://chrome.google.com/webs...inkfix=1516144253810 | |||
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Well if it works, it works. What do you have to lose by just trying it as is? Not like a 22lr is DGR. lol | |||
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Well if it does fail, whether from attempting to heat treat it or using it as is, I can't find a replacement. GOOGLE HOTLINK FIX FOR BLOCKED PHOTOBUCKET IMAGES https://chrome.google.com/webs...inkfix=1516144253810 | |||
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Found a source in Canada. https://www.facebook.com/jrsoutdooradventures/ $25 plus $5 S&H. GOOGLE HOTLINK FIX FOR BLOCKED PHOTOBUCKET IMAGES https://chrome.google.com/webs...inkfix=1516144253810 | |||
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Cooey's were made in Canada. They're as common as Civics up here, and just as neglected. More than a few parts guns around. | |||
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I live 13 miles from the Cornwall, ON bridge in rural Northern NY. The gun supposedly came from the Akwesasne Mohawk reservation that spans the border. GOOGLE HOTLINK FIX FOR BLOCKED PHOTOBUCKET IMAGES https://chrome.google.com/webs...inkfix=1516144253810 | |||
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(In my best Claude Rains voice): I'm shocked - SHOCKED, do you hear? - to find that contraband is crossing our borders by these means!  | |||
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Awhile back I was getting propane at a fuel station on "the res". A pickup pulled in with a 30' "cigarette boat" on a trailer. The boat was painted entirely in flat battleship gray. I wonder why they painted such a beautiful, fast boat in such a dull color like that?  GOOGLE HOTLINK FIX FOR BLOCKED PHOTOBUCKET IMAGES https://chrome.google.com/webs...inkfix=1516144253810 | |||
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Um, oh yes...duck hunting...yes, definitely duck hunting. It's a very fast-moving sport, don'tcha know.... | |||
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At yes, I see, high speed duck pursuit. Just run up behind them on the wing and grab their legs. Got it now.  GOOGLE HOTLINK FIX FOR BLOCKED PHOTOBUCKET IMAGES https://chrome.google.com/webs...inkfix=1516144253810 | |||
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