Winchester 190 ... slam fire??? any ideas???

T

tungngroove2000

CGN Regular
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hi all, i have just come across a problem with a rifle i got on the ee, took it to the range today, loaded 10 rounds into the magazine, pulled the charging handle and released.......and it went off. now it was pointed downrange, safety ON of course. i checked the chamber and it was loaded with another round.
i emptied it out, checked the action and it seemed ok. the trigger was already "released" as i checked the tension against it.
so i loaded it back up with a few more rounds, charged it with no issue, fired off the rounds i had loaded. these ones went off as they should, and ejected just fine. i was using CCI Blazers.
so i loaded up about a half dozen, and pulled the charging handle and released it, pop, it went off again, checked the chamber and there was another round ready to go. emptied the load, triple checked it was clear, again the trigger had "released" , put the lock on it, put it in the case and brought it home.
so in total there was maybe 20 rounds put through it.
i tore it down to see if i could spot anything amiss. nothing, it all seemed to be fine upon inspection. now that being said i am NOT a trigger expert and i'm thinking it's probably somewhere in there. sear/disconnect kinda thing.
i turn to you for some advice as to what might be causing this lil beauty to misbehave. the previous owner says he had no issue with it. your thoughts/ideas are appreciated.
in the end i know it will have to go to a gunsmith i'm sure, but some CGN diagnosis can't hurt.

thanks in advance for your help.
cheers
 
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Take the bolt out of the rifle and see if the firing pin has free, smooth movement. If there is dirt and crud in there, it may hold the firing pin forward which would cause the problem you are having.
 
gunrunner100 said:
Take the bolt out of the rifle and see if the firing pin has free, smooth movement. If there is dirt and crud in there, it may hold the firing pin forward which would cause the problem you are having.
Click to expand...

yes...i realized after i called it a night that i should've also stated......the firing pin is working as it should.....spring return is good.....it is NOT protruding from the end of the bolt....this is happening as though the trigger is being pulled but i appreciate the thought....thanks
 
You haven't said if the firing pin channel and all the other related parts are clean. Look for any shiny worn spots on those parts, any loose play where there shouldn't be, anything out of the ordinary. Because you just bought it from the EE, I would suspect there could be an on-going problem. Is the disconnector overly worn?
 
Sounds to me like it might be the trigger. Do what the others suggest first and if that doesn't work then check out the trigger group. Some folks go too far in the quest for a light, crisp trigger pull.
 
the bolt/components....firing pin, extractor etc are all seemingly fine. very smooth and clean. i am leaning towards the sear/disconnector...perhaps some excess wear that will not "hold" when the charging handle is released......where does one find parts for these in Canada??
 
and there it was, i replaced the disconnector with a new one i found. problem solved, the hammer holds solid as a rock when the charging handle is pulled back an released full force. i decided to replace the hammer while i was at it to make the chambering pull even smoother as it had a bit of wear on the front edge.
thanks for the ideas on this fix and perhaps this will help out another "home smith wannabe" (for minor stuff only).
 
The Winchester Model 490 was also prone to this problem. There was a factory recall and the serial number had an * added at the end to denote rework.
Had the same problem many years later. Ordered a LNIB trigger group from Western Gun Parts. Problem solved.
 
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