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coldblood

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I fired about 70 rounds from my SKS in the range continuously and on 71st round - click instead of bang. I take the round out (after 60 sec waiting period :)), the round looks solid but I see the weak mark of the firing pin on the cartridge like if the firing pin is not reaching but only slightly marking cartridge. I let the rifle to cool down. Try again. Same sh*t. Take my other SKS, fire rounds from the same batch. No problem. I came home, took the rifle appart - didn't find anything funny. No excess oil, assembled correctly. My hubby just called, he double checked the bolt and rifle assembly - he doesn't see anything wrong too. WTF? (sorry for the language).
 
Compare/Measure your firing pin protrusion on both rifles; they should measure the same.

Is your hammer stiking with the same force on both rifles?

It's probably something simple as an SKS is a pretty simple rifle...
 
Ryan j said:
Compare/Measure your firing pin protrusion on both rifles; they should measure the same.

Is your hammer stiking with the same force on both rifles?

It's probably something simple as an SKS is a pretty simple rifle...
Click to expand...



Thank you, I will check that.

I actually compared cases from both after this happened. I took case when the rifle cycled normally and compared with other rifle. According to the marks they both leave on the cartridge (when cycle normally) - looks the same but how otherwise measure the striking force I don't know. :redface: Interesting is that one SKS I have I've got unissued and unshot - no problem after about 600 rounds through. The one that does give me problem is the refurb one.

ps. To add details to the picture :): I disassemble completely and clean my rifles after every range use. So, no, the pin is not dirty and no excess oil on it.

pps. I still love my SKSs :p
 
coldblood said:
ps. To add details to the picture :): I disassemble completely and clean my rifles after every range use. So, no, the pin is not dirty and no excess oil on it.
Click to expand...

When you cleaned your rifle for the first time did you flush the bolt out with brake clean or something similar to make sure you removed all the grease?

If your protrusion measures the same on both rifles you may have a week hammer spring; swapping trigger groups between the two rifles should diagnose this.

Keep us posted.

Cheers

Ryan
 
Ryan j said:
I think she's talking about repeated FTF's with the refurb... aren't you coldblood?
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Yep. Nothing wrong with the rounds. Goes like this: pull - click - open bolt - eject round - round looks ok, just on the primer cap slightly visible mark where the firing pin striked, not as deep as on the round that went bang - insert cartridge to another rifle - pull - bang - next round in the chamber of first rifle - pull - click (repeat). I am not sure how you guys defind FTF (fail-to-feed?) so not sure if this term describes situation. :redface:
 
Ryan j said:
When you cleaned your rifle for the first time did you flush the bolt out with brake clean or something similar to make sure you removed all the grease?
If your protrusion measures the same on both rifles you may have a week hammer spring; swapping trigger groups between the two rifles should diagnose this.

Keep us posted.

Cheers

Ryan
Click to expand...

I disassembled the bolt assembly, cleaned it with Hoppe's 9 for semi-auto solvent until it was bone dry and clean inside out. Then, took a gun oil, oiled everything and then wiped out until everything was bone dry and assembled as usual. I did the same cleaning on the non-refurb one and seems that my cleaning works there ok. It is good that I have two rifles and can diagnose. I will try the trigger group swap as well. :)
 
Also are you getting a stuck firing pin. Next time see if the same round is able to fire. If so I would recomend switching out the bolt assembely for a new 1. Or if baught from a reputable dealer see if you can get an exchange.
 
i like the switching/testing trigger group idea... pretty sure it is the spring getting loose..
My SKS was also "unissued/unfired" ... and so far i'm probably close to 600-700 rounds through it, with proper cleaning every time i shoot, and i had the same problem once.. didnt pay attention to it back then, and never had it again... :) hopefully never will :)
 
It was like mix and match event in the range today, lol. First, I compared bolts, pins, springs, how the pins come out - looked absolutely the same for both rifles.

Then started "mixing and matching" - bolt from one rifle, trigger group from another, then, both - bolt and trigger group from one installed on another, then back to original combination... Shot 10 rounds with each combination - fired FLAWLESSLY every round with the original and with changed parts. Then, back to original parts - went bang every time.

I don't know how you explain this. It's friggin' weird. The only logical explanation is the "ghost in the machine", lol. :) Me thinks, however, that if it was a mechanical problem with one of the parts, it would not just go away by swapping parts around.
 
Spearhunter said:
Coldblood, sounds similar to my experience. The firing pin is hitting the primer enough to leave an indentation but not enough to detonate it. You might want to read up on my thread. Page 3 or 4 is where I began to find the cause. Good luck.

http://www.canadiangunnutz.com/forum/showthread.php?t=403836&highlight=sks+firing+problem
Click to expand...

Thank you for sharing. After reading your thread, I think that may be when I assembled the rifle after cleaning, the trigger group didn't drop in place by a bit. And that what caused the problem. When I started to swap parts, I basically re-assembled the rifle again and may be that time (several times back and force with second rifle) the trigger group fell in place. I didn't have even one FTF yesterday. However, I will go through all the steps other posters suggested in your thread - just in case.

Thanks again and I hope you don't have any more problems with your rifle. :)
 
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