Why is my mossberg ejecting 2 shells at once??

Question

I bought a brand new Mossberg 500 and after firing and pumping it, it ejects the fired shell along with the next (live) shell instead of loading it into the bolt to be fired.. really weird.. never herd of this problem before.. i took it completely apart and all the parts are brand new and build solid and strong.. is this a factory defect?? or possibly just need to be broken in??? it doesn't do it every time just randomly probably around 2 to 3 round out of 15 shots

Answer 1

Make sure its clean and lubed. If that does not fix it ....the cartridge stop or interrupter maybe the issue.z



I hope you did not take it apart before it started having problems.....did you? You may have something wrong...z

Answer 2

If it happens just after you fully load the gun and chamber a cartridge and then load one more into the magazine, it's the last shell you put into the magazine. You only pushed it forward to the edge of the elevator instead of fully into the magazine. Push ALL your shells a full half inch into the magazine as you load them and you won't have that prob.



If it's every shot/pump, your cartridge stop is either missing or broken or installed incorrectly. If it's not that part, the lifter is out of time. If it's a second hand gun, as in someone else has had their hands on it before it was sold to you, the last user was "not too well versed in Mossbergs" as a couple of others that answered you appear to be.



And no, that problem is NOT common with a Mossy.



http://www.youtube.com/watch?v=Vcu-G2x4b7I



Watch that video and strip and reassemble yours step by step along with it. When it comes to the cartridge stop and interrupter, the two first parts to come out after the trigger group and the last two parts to go back in before the trigger group, pay close attention.



If necessary, go to http:gunbroker.com and buy a set of new internal parts and replace all yours. They aren't expensive.



Addendum: "it doesn't do it every time just randomly probably around 2 to 3 round out of 15 shots".



Then chances are good it's simply that last shell bad loading I pointed out earlier. Give it a try. Load an empty shell into the chamber and close the bolt. Always SAFETY ON and point it down range!!! Now load a shell into the mag but only push it forward to the first click. It'll click onto the edge of the lifter, not into the mag. Now pump it exactly as if you had just shot it. The empty will eject and the next shell will fall out the bottom and hit the floor. Just be sure to fully insert all your shells all the way into the mag and you'll have no probs.

Answer 3

It is very typical of the Mossberg 500 and the Maverick 88 to "kick out" or eject two shells. Having used the 500 in the Military it was common for a heavy round such as a 00BK and 4 shot to loose one out of the bottom. It is a poorly constructed 4 piece reciever Mossberg uses in combination with a tight magazine spring that causes this. It cannot be fixed and could be added up to poor manufacturing and design. Get a Remington 870 and you will never have another problem from your pump....

Answer 4

There may be a very simple fix to this problem, make sure the gun is not tilted to the side when you are pumping it.



I've seen a new gun enthusiast do this before. They held the gun ejection port down while they worked the pump, the expended shell was ejected as it should be then the live shell simply fell out because gravity pulled it down out of the ejection port.



If this doesn't solve the problem you will have to take it to a gunsmith to have it checked out.

Answer 5

This is pretty common with Mossbergs! I've even had shells fall out of the bottom when trying to eject spent shells. Sell your Mossberg and move on!