Coeey Model 60 not striking the case hard enough

sl66ICEcuba

sl66ICEcuba

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I am not one to not clean a rimfire, I clean religiously. Just recently though, my go to Coeey started to not strike the case hard enough thus resulting in no detonation. It looks like the previous owner altered the firing pin slightly (the part that strikes the case was filled) but I cant see this being the problem since it worked before. Out of every 8 rounds being chambered only 1 will fire and all the rest only have light marks from the firing pin. Any tips or advice would be greatly appreciated, is it possible to take the bolt apart? This rifle and all my rest really like 333's and thats what I always prefer to use.

Thanks in advance
 
sure this isnt a ammo problem? try different ammo. i had trouble with winchester...
not the easiest thing to take it apart...let me see mine maybe i can help
 
The bolts come apart relativly easy. I built a bolt to fit the model 60 just to see if I could do it. On yours, I'm wondering if your spring has lost it's tension.
 
I had heard that they are known for light strikes. Mine certainly is known for it. About every third attempt is a light hit. I just pull the bolt back and hit it again. usually works.
 
I tried different types of ammo and still had the same issue, so I ruled that out. I also tried to re #### it then pull the trigger again and came up with the same results. So I am guessing it is either the firing pin or the spring is not strong enough. If anybody has any tips on how to strip the bolt that would be greatly appreciated. I will get pics of the rifle and the bolt out as a reference point later on.
 
if you pull the bolt just enough to twist it left into the cutout you can see the firing pin stick out of the bolt. you can tell whether the pin has flattened out from dry firing. this rifle is sensitive to it.
i might try to take mine apart to let you know how...if i can
 
if you pull the bolt just enough to twist it left into the cutout you can see the firing pin stick out of the bolt. you can tell whether the pin has flattened out from dry firing. this rifle is sensitive to it.
i might try to take mine apart to let you know how...if i can

well i only got to take it out. removed stock and loosened the 7/16 nut to move the loading tube out of the bolt and remove bolt. i tried to take it apart but have no idea. you may need a special tool to loosen the sleeve inside that you can see when you pull the bolt apart. i think its what is holding the spring in there. but that is as far as i could get. hope it helps.
 
You do need a special spring compression tool to take the bolt apart. My Cooey 60 pin also looks to have "file marks" on it, so that may be how it should look.

Definitely try different ammo first. If that doesn't resolve the issue it's most likely a worn out spring or a flattened firing pin. I would just try to find another used bolt at that point, rather than trying to locate or make a bolt disassembly tool.
 
sl66ICEcuba,
Just a thought, try pushing forward on your bolt knob after chambering a round then firing. It may be possible that there has been enough wear between the base of the bolt handle and the reciever that the face of the bolt is now too far away from the breech. If this is the case then you can either build up one or the other. Arguments for each can be found elsewhere, either under rimfires or general gunsmithing.
spacesaver
 
I have built over 250 bolts from scratch, every part. it is normal to have file marks, becuse u have to built the firing pin long, then file it down so that its flush with the end of the bolt. So first check if it is flush, if it is lower, it is impossible to adjust it. i can explain more about this if u contact me personally. Second, u can take it apart and see if a burr has built up around the knotch on the firing pin where it is held in by the pin. Third. the distance from the chamber where the bolt hits and the knotch where you lock the bolt downwards are not all exactly the same, so a new bolt sometimes needs to be fitted, if the distance is past the high side if the tollerence, the bolt face may not be all the way tight against the back of the shell, which would affect the headspace, the shell will be pushed foreward by the firing pin, but won't fire it. And fourth, the spring could be weak and not hitting it hard enough. These are the most likely things. there are a few more posablilities, but these are the most likely. Good luck. contact me if u need any help.
 
oh, and to take the bolt apart. take it out of the gun, pull the two halves apart, look in , and u will see a holding nut. a large pin will be going through it. now u need to make a tool that is shaped like a two prong fork, that is bent about 1'4" from the ends. space them out so that the line up with the two knotches in that nut. then just unscrew it. The firing pin has a lock pin holding it in. u may not be able to see it if it was finished correctly, but its not far down from the face of the bolt, need to push it out to get the firing pin out. it will be about 1/8" to 1/4" from the face.
 
Thanks for the help Jay, I filed the firing pin into a smaller point rather than the large circle it is was before. A smaller point should logically dent the case easier, I am taking it to the range tomorrow and I will be back with the results. If I am still having problems we will work from there.
 
Out of curiousity sl66ICEcuba, did your reducing the frontal size of the firing pin help? My uncle's got one of these with a firing issue and think your solution is simpliest.
 
aletheuo said:
Out of curiousity sl66ICEcuba, did your reducing the frontal size of the firing pin help? My uncle's got one of these with a firing issue and think your solution is simpliest.
Click to expand...

Yes it did work for me, what you need to know when doing this is reduce the firing pin strike point size very incrementally. If it becomes to fine you will start piercing cases, not fine enough and you will have light strike issues. Think of it this way, it is easier to stab something with a point then with a square object.
 
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