Mossberg SA-20 Troubleshooting

Discussion in 'Mossberg SA-20' started by DHonovich, Sep 3, 2010.

  1. john797

    john797 Copper BB

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    2
    Yes it does, thanks I'll take a look at it this weekend.
  2. Dean Tanji

    Dean Tanji Copper BB

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    1
    First time poster. Thanks for all the information on the SA-20 you regulars have posted.

    I have a brand new SA-20 Tactical. Was happy to see the Mag Follower (11) was RED. Simplifies "chamber check, mag check". If you see red, no shell in mag. Removed the Mag Plug (14) for a "1 in chamber, 5 in mag" capacity. Ordered the 2 shell mag extender. Read all the problems with various ammo.

    This morning I shot the following sequence:

    Winchester Super X, High Brass, 2-¾", ¾ oz. 1600 fps slugs. Shot 60 rounds (10 6-shot loads) and the SA-20 cycled flawlessly!

    Remington Slugger, 2-¾", 2-¾ Dr Eq., ⅝ oz. hollow point rifled slugs SP20RS15. 60 rounds (10 6-shot loads) of flawless cycling!

    Winchester AA, Super Sport Sporting Clays, 2-¾", 1300 vel., ⅞ oz. 7-½ birdshot, low brass. 72 rounds (12 6-shot loads) and the jams started! Almost every first shot did not eject and half the time the second shot would not eject. The following 4-3 shells in the mag would cycle successfully.

    Winchester Super X, High Brass, 2-¾", 1220 vel, 1 oz. 6 birdshot. 60 rounds (10 6-shot loads) and SA-20 experienced only 3 ejection failures.

    As expected the two different brands of high brass, high muzzle speed slugs cycled flawlessly.
    The high brass birdshot had a couple failures.
    The low brass birdshot had many failures.

    I'll do a complete cleaning and polish the chamber (stiff brass bristle brush w/fine steel wool and maybe polish some of the bolt assembly slide areas as described in this forum and see if anything improves.

    Thank you! Thank you!
  3. old mossy

    old mossy Global Moderator Staff Member Global Moderator Forum Moderator

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    12,134
    Welcome to the forum from NY and congrats on your new Mossy. You get a chance post a pic or two.:)
  4. Darren Hanson

    Darren Hanson Copper BB

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    2
    Just bought a new SA-20 for my wife and daughter. First time out we have had some trigger issues. After you fire the first round and try and take a follow up shot it will not fire. Pull trigger again and it will. Need to pull trigger twice on second shot. It dose not happen every time. I took trigger assembly out and have found that the rear spring is so weak it dose not apply enough force to push toggle arm back down. Toggle arm is not the correct name I'm sure but can not find a parts list for the trigger assembly. It is at the very rear of the asssembly. Anyone else having this issue?

    Well I stoped by the gunsmith today. I had left the SA-20 there on Wed. They were able to duplicate the problem. I was told it is not the spring. It is made that lite for a reason. The toggle is rubbing on another part. The gunsmith said he will polish the parts and it should solve the problem. Hope to get it back on Sat. I'm just very happy that it does not need to be shipped back to Mossberg!!! Will keep you all updated--
    Last edited: Jul 11, 2014
  5. Illini Bird

    Illini Bird .410

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    31
    I purchased an SA-20 in February but was unable to shoot it until Saturday (5-9-15) when I attended the NRA Basic Shotgun course. It was a ten hour course and well worth the time & money.

    However, when the instructor and I took my SA-20 to the range, the trouble started (yes, it was one-on-one as I was the only student). I was told to purchase target loads for my shotgun so I bought Federal Target loads 20 gauge shells; 2 1/2 dram weight; 7/8 oz; #8 shot. The instructor loaded the gun and attempted to fire it. It would not recycle the shells and they also became jammed. He tried several shells but basically, they would not work. Then we tried some Federal Premium Defense 20 gauge shells; 24 pellets - #4 buck shot; 1100 FPS - copper plated. These rounds worked flawlessly. The instructor then went back to the lodge and brought back some Remington rounds that he thought might be heavier (close to 1 oz.) and we got mixed results. The instructor told me this probably shouldn't happen but did note the shotgun was sold as a "tactical" shotgun and he thought it should use a heavier (1 oz) rounds.

    I called the Mossberg phone number listed in my Owners Manual and he stated that since the shotgun is made in Turkey that the shell sizes are not exactly the same in the two countries. He said if I looked in the Owners Manual that I should use 3" magnum shells between 2 3/4" (15/16 oz) and 3" (1-1/4 oz). I think this was the problem with my gun but will not be able to try it again for awhile since I have to shoot it at a range far away from my home.

    Besides the Federal Premium Defense 20 gauge shells, what other self defense or field loads have others had luck with in the SA-20 so that it cycles and loads correctly? I am going to return to Bass Pro Shop after I get some advice from other members and purchase different shells.
  6. Illini Bird

    Illini Bird .410

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    31
    Well, what happened?
  7. Darren Hanson

    Darren Hanson Copper BB

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    After gun smith polished. Works like a charm. I did see in manual to use 1oz shot. So that's all I buy. Have had no problems. Love this little gun. Shoots great. Daughters like it as we'll. For the money it's a winner.
  8. BrianJ

    BrianJ .223 Supporter

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    109
    I use the AA 1200/1300 fps 7/8 oz 7.5 and 8 with no problems. I do have quite a few rounds through it though. Probably 2k or so.
    In the beginning I had to use 1oz high brass. It seems to have "loosened up a bit" now.
    Keep it a little "wet" lubed for a while.
  9. Lefty9

    Lefty9 .223

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    199
    Even I , an amateur, a novice -know that unless your Thug is "worked" ,or thoroughly broke in - it will not readily cycle sissy ammo .
  10. Lefty9

    Lefty9 .223

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    199
    I found mine loves the 3" shells but has problems with 2 3/4 stuff unless it's a beefed up load. I am sure with time it will get better - but for now it "stove pipes" the "sissy" ammo ;)

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