Cooey Model 60 Issues (Scope mounting, ejection/jamming & misfires)...

thenerdboy

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Hi everyone,

I've been a lurker here for a while and have used the EE but haven't really posted anything. Shortly after joining the site I picked up a Cooey Model 60 from a fellow CGNer to use primarily for plinking. While it has shaped up to be a pretty decent rifle, the Cooey has given me some issues and I'm still working out the bugs.

Initially there were problems with the inner magazine tube as the crimp had broken and was repaired at some point. I was unable to load more than 3 or 4 rounds into the magazine from the get-go and the seller worked with me to come to a resolution (great CGNer!). Shortly after, I discovered that the magazine assembly on the rifle, an original 60, had been replaced with a tube from a later Model 600. I was able to locate an inner + outer tube assembly in good condition from an original 60 and installed it (also from another great CGNer!). I also installed a new Weaver side mount base (#2, I believe) and the high rings to go with it. My Nikon 3-9X40 barely fits onto the rifle! Since then I have been enjoying the rifle with friends and family.

Lately I've been bitten by the target shooting bug and have been trying to test the accuracy of my old Cooey. While shooting for groups, I've been encountering some common issues with the rifle and I was hoping that someone might have some suggestions as to how they could be fixed. I've searched CGN and read many threads on all sorts of issues but am hoping for some ideas to fix the problems, rather than sell the Cooey for something else. The main issue I'm having is that when the spent casings are ejected, they bounce right back into the chamber and jam the next round. Usually I have to pick out the casing and the next round in order to cycle the bolt and reload. Sometimes the gun jams every other time, only actually loading 5 or 6 rounds out of 11 properly. The number of jams varies a bit, depending on how the gun is pointed when the bolt is pulled back. If the gun is pointing down at the ground or up at the sky, it tends to eject and reload properly. From the bench however, it will jam about 50% of the time. Is there any way to improve on this or should I simply accept that the gun was not designed to wear a scope?

The other problem is that since I swapped the magazine tubes, I've experienced occasional misfires. After recocking the bolt, the round always fires as it should. Any ideas? I never had this problem before switching the magazine. I have given the bolt and receiver a thorough cleaning.

Hopefully I can resolve these issues, or at least improve on them so as to make the rifle more enjoyable to shoot. It has been quite accurate for plinking but the jamming issues with scope have made shooting for groups a difficult process. I would like to keep the rifle but also had the opportunity to try out a Mark II recently and it was really nice to shoot a modern rifle designed for a scope. In some ways I wish I had just purchased one to begin with but it didn't have the same vintage feel that my Cooey does.

Thanks everyone!
 
Nothing about swapping the tubes could I imagine would cause misfires. Could just be the ammunition you are using, or alternately, now that you have a fully-functional firearm, you are noticing the problem more often. Try a different brand, possibly. Only other reason I could imagine might be a weak strike from a tired spring.

Ejection issue- Model 60s eject straight up. If there is a scope in the way, it'll bounce straight back down. There is no mechanical way around this. I suggest just developing a habit to tilt the rifle to the right as you pull back the bolt to encourage the spent case to drop out. Also, be sure to really give'r when you cycle the bolt to avoid the hangups you were having. The fresh round coming up is the ejector of the spent one.
 
Nothing about swapping the tubes could I imagine would cause misfires. Could just be the ammunition you are using, or alternately, now that you have a fully-functional firearm, you are noticing the problem more often. Try a different brand, possibly. Only other reason I could imagine might be a weak strike from a tired spring.

Ejection issue- Model 60s eject straight up. If there is a scope in the way, it'll bounce straight back down. There is no mechanical way around this. I suggest just developing a habit to tilt the rifle to the right as you pull back the bolt to encourage the spent case to drop out. Also, be sure to really give'r when you cycle the bolt to avoid the hangups you were having. The fresh round coming up is the ejector of the spent one.

this x2! Having high rings on the gun will help a bit with ejection, but as mentioned, the cooey 60 ejects straight up. No choice but to tilt the rifle to the right when reloading. And all the 60's I've had really needed a nice firm pull/push on the bolt to ensure cycling was best
 
Most of the Cooey repeater/60/600 I have experienced are because the takedown stud hasn't been set up quite right. Changing the magazine tube means that stud's setting might have changed. Some of the older stocks were hand fitted, so it's also possible a changed magazine tube could rub(or have limited travel) inside the stock.

I like to tighten the stud just until it binds the magazine tube, and back it off 1/4 turn. Test and repeat until smooth cycling. Miss the sweet-spot? Start over, but change in 1/8 turn increments.

If binding occurs, or consistent mis-feeds I'd guess stud is too tight agains magazine tube. Sloppy cycling, hard to remove inner magazine tube, mis feeds (smae symptom but two causes) than stud is likely too loose.
 
Thanks, everyone! I'm happy to hear that I'm not experiencing anything unusual. I took the rifle out last night and had a few misfires but was shooting bulk Dynapoint ammunition so it may have been the culprit. The rims looked to have received a good strike from the firing pin. I'm not sure whether or not I will keep the rifle if there is no way to improve the ejection issue; unfortunately the Cooey just wasn't designed for a scope.
 
I had increasing misfires, just like you said where popping it a second time almost always worked. Kept getting more and more frequent as I concentrated on group sizes and POI at different distances. After examining the trigger and where exactly everything travels when making a shot, I determined that pulling the trigger too slowly was the cause. It would drag on a tapered area on the bottom of the hammer? Next time out, I made sure to pull the trigger quickly and with follow through, never misfire again. Not quite how I learned to shoot a rifle but works on the cooey.
 
Thanks again everyone. I had the rifle out tonight to line up the iron sights and didn't have any problems at all. The ejection/jamming issues were all related to the scope. I also took dla's advice andhad fewer misfires though there were a couple duds in my bulk pack of DynaPoints.
 
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