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Thread: Sako Extractor Problems

  1. #1
    Join Date
    Feb 2003
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    Sako Extractor Problems

    Rem 700 S/A 7MM WSM
    Sako extractor was already installed when I bought the gun
    There is no problem at all with extraction, it pulls loaded and spent cartriges out with ease
    When it comes time to flip the cartrige out of the ejection ort, the case falls back in on top of the other cases in the magazine, or on top of the follower.

    There is a slight chip of material missing out of the "claw" portion of the extractor, perhaps 25% -30% of the claw is missing.

    Yes, I have taken everything apart, cleaned, looked for burrs, lubed, and re-assembled.

    Could this missing piece of the claw be the problem?

  2. #2
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    The extractor was probably modified to alter the ejection angle. More towards the 3 0'clock position instead of the 1:30 -2:00 position.
    One of two things is happening. The bolt ID counterbore depth combined with a heavier than needed ID chamfer allows the case to move from under the extractor as the the case pivots towards the loading port. The other possibility is the case is hitting the windage knob on the scope and bouncing back into the action. Reducing the strength of the ejector spring can sometimes help. The biggest mistake with Sako extractor installations is the idea that less counterbore depth is better. I started out doing that but quickly learned it didn't work well. .140"-.150" with a modest chamfer works just fine.

  3. #3
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    I already talked to a couple people that mentioned he windage knob situation. After looking closely and slowly, I figured out that the windage knob is not the problem.
    Can you please explain more what I need to look at for the possible counterbore situation?

    So if I have the situation that you explained above, the situation is beyond repair?
    Last edited by Joe; 12-01-2020 at 10:27 AM.

  4. #4
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    Augusta, Maine & Palm Coast, Fl
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    How about the ejector spring?

    Quote Originally Posted by Joe View Post
    I already talked to a couple people that mentioned he windage knob situation. After looking closely and slowly, I figured out that the windage knob is not the problem.
    Can you please explain more what I need to look at for the possible counterbore situation?

    So if I have the situation that you explained above, the situation is beyond repair?
    Is the ejector spring very soft? Perhaps the spring has been modified to try to limit the amount of ejection?

    Pete

  5. #5
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    Quote Originally Posted by Pete Wass View Post
    Is the ejector spring very soft? Perhaps the spring has been modified to try to limit the amount of ejection?

    Pete
    The ejector spring is very stiff
    I also swapped it out of a 7Rem Mag that throws brass farther than I can throw a dead Cat.
    No difference.

  6. #6
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    Feb 2003
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    The problem is that when the case mount (empty case) or when the bullet (loaded round) clears the ejector port, the case falls back in to the receiver

  7. #7
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    Can you measure the inside diameter and depth of the counterbore and post a picture?
    The windage knob thing happens very very fast. Faster than the eye can pick up most of the time. Ask me how I know.

  8. #8
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    Sure, gimme a few minutes.
    Something else, don't know if it's a problem or not.
    The bolt nose was not replaced, it is original and it is not "round" it has irregular cuts in the I.D. to accept the factory extractor

  9. #9
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    Feb 2003
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    C'Bore depth .140", C'bore dia. .546"
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  10. #10
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    Diameter is a bit large from not installing a bushing but nothing jumps out at me. My next move would be to reduce the ejector spring by 2 or maybe even 3 coils.
    Just thinking 15 minutes ahead. How much end play, bolt nose clearance, do you have?

  11. #11
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    Bolt nose clearance? Explain please.
    Do you mean inside the tenon on end of barrel?
    I sent you a PM

    Do you think I should cut the ring off the bolt nose and sweat a new one on?

  12. #12
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    Ya might try

    getting a replacement hook or a new Extractor kit and replacing the existing hook. Perhaps more that the notch was done to it. A ring reducing the size of the opening could be silver soldered in also.

    Pete

  13. #13
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    Quote Originally Posted by Pete Wass View Post
    getting a replacement hook or a new Extractor kit and replacing the existing hook. Perhaps more that the notch was done to it. A ring reducing the size of the opening could be silver soldered in also.

    Pete
    I can't find a Large Sako hook in stock anywhere so I ordered one from PTG. It's going to be several weeks for delivery though.
    Maybe I will make up a couple out of Tool Steel on the CNC, not sure though.

    Does anyone have a Large Sako hook that you would part with?

    Will most likely sweat a new ring on the bolt nose and machine it to some better clearances.
    What diameter would be best for a shortmag case?

  14. #14
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    Quote Originally Posted by Joe View Post
    Bolt nose clearance? Explain please.
    Do you mean inside the tenon on end of barrel?
    I sent you a PM

    Do you think I should cut the ring off the bolt nose and sweat a new one on?
    What I mean is how much forward and aft movement is in the bolt when decocked in the closed position. It will give me some idea for a possible fix.
    Do not remove the nose of the bolt. What normally is done on extractor installs is the bolt counterbore is bored out and a ring soldiered in. Then ID bored to the correct diameter, faced off, then machined for the extractor. Makes for a cleaner extractor install. The ID will fit the rim diameter closer which may help you.

  15. #15
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    Quote Originally Posted by Dave Tooley View Post
    What I mean is how much forward and aft movement is in the bolt when decocked in the closed position. It will give me some idea for a possible fix.
    Do not remove the nose of the bolt. What normally is done on extractor installs is the bolt counterbore is bored out and a ring soldiered in. Then ID bored to the correct diameter, faced off, then machined for the extractor. Makes for a cleaner extractor install. The ID will fit the rim diameter closer which may help you.
    There is .011" of linear trave in the bolt.

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