landofficer Posted December 11, 2017 Report Share Posted December 11, 2017 Hi i have a bit of an issue that need help with. I have a cz 455 .22 that is going off when I close the bolt quickly but not so when do it slowly. The bolt head had some crud around it so have cleaning it off but when dry firing it is still does it any one else had this cheers in advance Quote Link to comment Share on other sites More sharing options...
snow white Posted December 11, 2017 Report Share Posted December 11, 2017 Have you ajusted the trigger or changed the trigger spring Quote Link to comment Share on other sites More sharing options...
maxwell Posted December 11, 2017 Report Share Posted December 11, 2017 2 hours ago, snow white said: Have you ajusted the trigger or changed the trigger spring This is the usual cause of slamfire Quote Link to comment Share on other sites More sharing options...
landofficer Posted December 11, 2017 Author Report Share Posted December 11, 2017 Yes I’ve had new springs put in but that was ages ago and been ok until now even though not used it for a bit. Quote Link to comment Share on other sites More sharing options...
Lloyd90 Posted December 12, 2017 Report Share Posted December 12, 2017 3 hours ago, landofficer said: Yes I’ve had new springs put in but that was ages ago and been ok until now even though not used it for a bit. Might have loosened up over time or do a knocking or dropping it etc have you still got the set? Try a higher pull spring and see if it sorts it Quote Link to comment Share on other sites More sharing options...
oldypigeonpopper Posted December 12, 2017 Report Share Posted December 12, 2017 (edited) hello, as other members have said it might be if you have had the spring changed it may have been to softer version, most 455 owners have changed from the original that gave a very hard pull by buying a trigger kit which has 3 springs eg soft/medium/hard, then fitting the medium as i have done also, seems a bit pointless having to buy the kit for 1 spring, i am sure some PW members have tried to find a source for this middle spring but have not heard if any luck. , also you mention some crud !!!!, i also find after using 50/100 bullets you can get tiny brass fragments in the breech which you can use a vacuum cleaner to suck out, i also clean off the waxy film on the RWS subs i use with white spirit Edited December 12, 2017 by oldypigeonpopper Quote Link to comment Share on other sites More sharing options...
bruno22rf Posted December 12, 2017 Report Share Posted December 12, 2017 I'm no expert but surely if the gun fires when you close it quickly, but not slowly, then the firing pin could be sticking inside the bolt? Quote Link to comment Share on other sites More sharing options...
oldypigeonpopper Posted December 12, 2017 Report Share Posted December 12, 2017 7 minutes ago, bruno22rf said: I'm no expert but surely if the gun fires when you close it quickly, but not slowly, then the firing pin could be sticking inside the bolt? hello, forgot to mention that bruno, it may be another thing to look at, i use a very fine gun oil spray to keep the pin lubed Quote Link to comment Share on other sites More sharing options...
snow white Posted December 12, 2017 Report Share Posted December 12, 2017 Take the bolt out and strip it down not a hard job to do clean any **** out then try that. Quote Link to comment Share on other sites More sharing options...
bruno22rf Posted December 12, 2017 Report Share Posted December 12, 2017 (edited) On reflection - the firing pin should not be there should it - the trigger sear would catch it as the bolt is moved forward so more likely a trigger sear problem - has it started happening since the weather got colder? - could be grease/oil on the sear becoming thick/gummy due to low temperatures. Edited December 12, 2017 by bruno22rf Quote Link to comment Share on other sites More sharing options...
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