Mosin Nagant bolt coming out while cycling

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Slipnslide

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Ontario, Canada
So I just bought a Mosin Nagant 1942 surplus rifle and a bunch of surplus ammo. Took apart the entire rifle today and cleaned all the cosmoline off via some stuff I read on the internet. The action feels good, gun shoots pretty decent too.

I've had a bit of an issue with the bolt coming out while cycling the action, at first I assumed it was because I oiled the gun up quite a bit after stripping the cosmoline off it, and maybe the oil was getting a little sticky in the -15 weather here? Left it in the house for an hour or so and it still does it every 20 or so times I cycle the action. The trigger seems to be a little loose, maybe I installed something incorrectly or the spring that tensions the trigger is worn out?
 
The bolt stop is likely not screwed in the whole way or has lost tension. The bolt stop is held in by the big fat screw by the trigger on the underside of your receiver. I'd be checking that first. Oil being sticky would not cause this issue.
 
Slipnslide said:
You were right, just disassembled it and the bolt stop screw was a little loose. Would you use something like blue locktite on these screws?
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I wouldn't, it shouldn't loosen if tightened to a reasonable torque value. That being said I've had more than one Finnish Mosin that had the screw on gorilla tight so clearly some Finns liked adding a bit of security torque. It could be a tolerancing issue.
 
BlackPowderBurner said:
I wouldn't, it shouldn't loosen if tightened to a reasonable torque value. That being said I've had more than one Finnish Mosin that had the screw on gorilla tight so clearly some Finns liked adding a bit of security torque. It could be a tolerancing issue.
Click to expand...

Materials will shrink in very cold dry weather. Could be the Finns did it because of that?
 
If you put a spring on the trigger to hold it forward it will prevent the removal of the bolt. I do this when I put a washer under the bolt stop to shorten the trigger pull.

For the spring I just use a paper clip bent into place.
 
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