“Short-shucking” happening more frequently. Ideas?

Discussion in 'Shotguns' started by 1KPerDay, Sep 20, 2020.

  1. 1KPerDay

    1KPerDay Member

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    I love my Mossberg 590 Marincote from the mid 90s and I’ve been running it in multigun competition the past few years. Initially I could run the slide as fast as I could shoot and it would keep up with me, but the last few times I’ve gotten clicks on an empty chamber several times per match. I haven’t changed my technique and I’m running the slide back all the way, just quickly.

    I replaced the magazine spring with a Wolff extra power one a couple matches ago but it doesn’t seem to have helped. I do keep the mag fully loaded at home if that matters.

    Do I need to try a new interrupter or shell catch?
     
  2. tyto

    tyto Member

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    I happened to watch a Miculek video recently where he had a misfeed and said it was due to soft shouldering while cycling the action at the same moment, he also had a weak mag tube spring. Could the mag tube be dirty?
     
  3. Rexster

    Rexster Member

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    A shorter stock helped me, prescribed my a firearms instructor. I was in my fifties, so a gimpy shoulder may have been a factor. The short stock, a Magpul, plus plenty or reps, did cure the problem, but my long neck and long arms “want“ a long stock, so I switched to the Benelli M2.
     
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  4. 1KPerDay

    1KPerDay Member

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    Well I cleaned it well when I swapped the spring and I don't feel like I'm soft-shouldering, but thanks for the ideas. I'll check it out. Usually it runs like this:
     
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  5. 1KPerDay

    1KPerDay Member

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    Interesting. This one has about a 12" LOP compared to the polymer OEM stock and it seems suitably short, but I'll look into it. thanks
     
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  6. PapaG

    PapaG Member

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    No idea. I'm fast. I shoot trap doubles and skeet with an 870 or M12 and have never short shucked. And I carry a high average. Maybe I'm not that fast, just lucky. Wish I had some internet wisdom to impart. I pull back hard enough to feel the bolt bottom out but don't think about it. Hold hard against the shoulder and pump hard is all I can say. Down the road, parts will fail. I know.
     
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  7. KsSkaEnthusiast

    KsSkaEnthusiast Member

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    I've been told work it like you're mad at it. This advise can vary for guns you may have more invested into but it worked like a dream with my maverick 88 12 gauge and friends' 870s.
     
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  8. Drail

    Drail Member

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    There are a number of springs in that gun besides the magazine spring. One of them may have weakened or was just poorly tempered. I would replace them all. The carrier/lifter spring may not be keeping up with your hands.
     
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  9. earlthegoat2

    earlthegoat2 Member

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    I use a Browning BPS for sporting clays and I am told that I am really fast. I do short shuck it periodically. Maybe 1 out of 4-500 rounds. I’m convinced it’s me and not the gun.
     
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  10. 1KPerDay

    1KPerDay Member

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    There is no carrier/lifter spring. It’s cammed up and down.
     
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  11. Drail

    Drail Member

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    THAT'S a good design. Then maybe all you need is a good orthopedist. Could be worn elbow dampers.......
     
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  12. 1KPerDay

    1KPerDay Member

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    That's a possibility LOL
     
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  13. PapaG

    PapaG Member

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    Keep in mind that you have to get the old one out before you push the new one in. A good man can shoot a pump faster than a semi. Ask Jerry.
     
  14. MikeJackmin

    MikeJackmin Member

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    I am recalling something I read a while back and I might not be recalling it correctly.

    In normal operation, the interrupter allows one shell to pass, to be blocked by the shell stop. The interrupter blocks the following shells. Later, the shell stop releases that one shell it has on-deck at the appropriate part of the cycle.

    During recoil, the shell in the on-deck location can be pushed back up into the magazine, getting past the interrupter. With no shell left on deck, the result looks and feels like a short stroke.

    Obviously, a nice stiff magazine spring helps, and I see that you've replaced it. Keep track, and see if it only happens when the magazine is mostly empty. Shorter, heavier shells, and heavier recoil, make it more likely.
     
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  15. Dinosaur1

    Dinosaur1 Member

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    Many years ago I had an 870 Wingmaster I would shortshuck continuously. Never did figure it out but it must have been fit cause I sold it to a shorter guy and he never did it. It was a 20 by the way. Moved up to a 12.
     
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  16. 1KPerDay

    1KPerDay Member

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    Yeah, I've actually been wondering if it has something to do with the timing/recoil. Like I happen to be hitting the back of the stroke just as the column of shells is bouncing forward and taking pressure off the shell catch or something. I cycled live rounds (on the range, safe environment) through it as fast as I could physically move and had zero feed issues. But during shooting/matches it's becoming more common for the bolt to close on an empty chamber.
     
  17. JCooperfan1911

    JCooperfan1911 Member

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    Try a remington police model. The springs and parts are made to keep up even running it extremely quickly.
     
  18. 1KPerDay

    1KPerDay Member

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    No thanks
     
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  19. entropy

    entropy Member

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    The error is operator induced. Throwing parts and $$$ at it is not a solution. You know what you have to do.

    Time to evaluate whether the games are interfering with you SD capabilities. It's why I quit pistol competition. (Except the occasional Bullseye challenge.)
     
  20. Ru4real

    Ru4real Member

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    I used to tell people this, also. Then a couple years ago I got a new Mosberg 930 automatic and did some testing versus my 870. Not only am I faster with the automatic, I’m more reliable too. Trying for all out speed to beat the 930, I occasionally end up short shucking a round with the 870. So I don’t / can’t say that anymore.

    Jerry M uses a 930 for 3 gun still, I’m pretty sure. The only way I can get the 930 to mis-fire is to soft shoulder.
     
    Last edited: Oct 9, 2020
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  21. entropy

    entropy Member

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    Some of the Beretta-style autos are faster than, for instance, the 1100. I could fire faster with my 870 faster than my best friend back in the day with his 1100, but I'd be willing to bet an a303 would be faster.
     
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  22. Armored farmer

    Armored farmer Member

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    Move your hand farther up on the forend. This will improve your swing also.

    Pivot your waist not your arms.
     
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  23. entropy

    entropy Member

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    The few parts that are different in the Police models have nothing to do with his problem.
     
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  24. JCooperfan1911

    JCooperfan1911 Member

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    Wrong.
     
  25. George P

    George P Member

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    My Beretta can empty the magazine with all the empties still airborne; not happening with a pump
     
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