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loose barrel?

Discussion in 'Mossberg 930 Autoloader' started by deadctr, Jan 31, 2019.

  1. deadctr

    deadctr Copper BB

    Messages:
    4
    Just picked up a 930 pro series waterfowler, 12 gauge. Looking forward to breaking it in.

    As always, I broke the gun down for a thorough cleaning upon getting it back home. I had noticed before taking it apart, that there was slight play in the barrel. Almost like the magazine cap was loose.

    Thorough cleaning, re-assembled, tightened mag cap, tight, and barrel still has a slight "looseness".

    First Mossberg, but all my other semis and pumps lock up tight.

    Is this normal, or should I be sending it back for work?
  2. Water Monkey

    Water Monkey The man, the myth, the monkey Moderator Supporter

    Messages:
    3,692
    You sure the forend is fully seated?

    I've found mine needed a little wiggle to get it fully set which frees up more threads for the cap.
    meanstreak and John A. like this.
  3. JohnR6464

    JohnR6464 Copper BB

    Messages:
    3
    Mine did the same.
    Turned out that the magazine tube was loose.
    It should me screwed in tight to the receiver with locktite.
    Take it out, clean the threads good, on the tube and in the reciever, so the lock tite adheres.
    Since the tube was not screwed in all the way, the magazine cap couldn't lock the barrel in.

    Hope that is your issue too.
    Let me know.
    meanstreak and John A. like this.
  4. deadctr

    deadctr Copper BB

    Messages:
    4
    Dang. I wiggled it but there was no more take up, and checked the mag tube, which was tight. I did not remove the mag tube, since it was very hand tight (didn't want to put a stillson wrench on it).

    There is still a very slight wiggle, I'd put it at less than a 1/16" that I can turn it, and that is with the bolt at battery.

    Wondering if I should even concern myself with it?

    BTW, thanks for the responses and insight.
    meanstreak likes this.
  5. John A.

    John A. I'm "THAT" guy Staff Member Global Moderator Moderator

    Messages:
    13,690
    I'd concern myself with it. Lots of pressure going on in there and I don't want a wobbly barrel in the mix.
    meanstreak likes this.
  6. tcecil88

    tcecil88 .30-06

    Messages:
    1,164
    Agreed, bad things happen when the pressure finds an escape route back toward you rather than down the barrel. Path of least resistance and all that.....
    meanstreak likes this.
  7. deadctr

    deadctr Copper BB

    Messages:
    4
    First off, thanks again for all the responses. As I said previous, when I got the gum home I took it apart, cleaned it well, and put it back together....... here it comes.
    When I took it apart, I swear I laid everything out as it came off the mag tube, and put it back together just as it came apart. This isn't the first gun I've had apart and always lay things out as they come apart.
    Anyway, I took it back apart again, just to see if I could get it tighter.
    Turns out the gas spring was between the pusher and the spacer tube, rather than between the pusher and the retainer. Once they were all where they were to be, it tightened up nicely.

    Now, was it like that from the factory? I would hope not, and it was me that slid them on out of order.
    meanstreak and Bobster like this.
  8. John A.

    John A. I'm "THAT" guy Staff Member Global Moderator Moderator

    Messages:
    13,690
    meanstreak likes this.
  9. deadctr

    deadctr Copper BB

    Messages:
    4
    Yep, that's how it is now.....
  10. meanstreak

    meanstreak .30-06 Supporter

    Messages:
    2,067
    Glad you got the problem solved and welcome to the forum.

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