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SKS not firing!

Discussion in 'Maintenance & Gunsmithing' started by unionguy, Apr 8, 2009.

  1. unionguy

    unionguy Portland Active Member

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    Looking for some help...I have a Yugo SKS M59 that is only "dimpling" the rounds and not firing. I thought it was the bolt and firing pin, so I bought a new complete bolt and installed it...still doing the same thing! Anyway have ideas of what the culprit might be? What I should check next?

    I'm thinking maybe a headspace issue, but unsure of how to check that on an SKS.

    Other ideas?

    thanks.
     
  2. ZombieAssassin

    ZombieAssassin Oregon Member

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    Check sksboards.com.
     
  3. eldbillbo

    eldbillbo clackamas New world samurai and a redneck none the less Bronze Supporter

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    i'm no expert in sks but maybe a tired hammer spring as import primers are hard

    i thinks head space checking is the same as with most others get some gauges and follow instructions
     
  4. ZombieAssassin

    ZombieAssassin Oregon Member

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    Sounds plausible that the hammer spring could be weak, considering he replaced the bolt and no change. If the hammer spring doesn't decompress with enough force, then it conceivably could be strong enough to cause the firing pin to engage, yet weak enough to not hit the primer with enough force for the desired click-bang effect. Try getting spare parts from e-gunparts and replace the hammer spring in the trigger group.
     
  5. gallogiro

    gallogiro Willamette Valley Active Member

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    What ammo did you use? Did you try different ammo?
     
  6. ZombieAssassin

    ZombieAssassin Oregon Member

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    Unionguy, if you haven't tried Brown Bear ammo, I will sell you a box of 20 rds for $5. That is the only kind I use in my SKS, and I have never had a problem with primer duds.
     
  7. OreGunSun

    OreGunSun PDX/Clackamas Member

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    Was it working before? Is it new to you ? Have you cleaned ALL the Cosmo off?

    Your recoil spring installed correctly?

    Any changes ? Stock, After market Mags, etc

    It could also be bad Ammo - That would be the first thing that I would try was different ammo.

    If you can find some commercial 7.62x39 in brass ( Winchester, American Eagle, most of the retail ammo (as opposed to Military ammo) They uses a lot softer primer (i.e. For Ruger Mini-30 and AR with a 7.62x39 upper and even Ak's)

    for Example CCI34 Military Large Rifle Primers

    Military-style semi-auto rifles seldom have firing pin retraction springs. If care is not used in assembling ammunition, a "slam-fire" can occur before the bolt locks. The military arsenals prevent this using different techniques and components - including different primer sensitivity specifications - from their commercial counterparts. CCI makes rifle primers for commercial sale that matches military sensitivity specifications that reduce the chance of a "slam-fire" when other factors go out of control*. If you're reloading for a military semi-auto, Look to CCI military primers.

    * Effective slam-fire prevention requires more than special primers. Headspace, chamber condition, firing pin shape and protrusion, bolt velocity, cartridge case condition, and other factors can affect slam-fire potential Use the same data as CCI magnum primers
     
  8. unionguy

    unionguy Portland Active Member

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    The problems did all start when I took it out of its wood stock and put it into a Tapco. What could that be doing??

    I am using Wolf Ammo and I probably do need to clean everything more thoroughly.

    Thanks for those ideas!