Mossberg 930 spx Cycling Issue

Cheo2012

Hi, Hope someone can share some knowledge in this situation.
I bought a Mossberg 930 spx and im having some issues with the rounds feeding from the tube to the chamber. it won't do it. I put one round in the chamber and lode the mag with seven more rounds, when I try to manually eject the round it ejected the first one , but the other round stayed in the tube, when I finally got it to cycle it doble fed, it jam. I took it apart and cleaned it real good and it worked for a bout 6 full cycle, then started doing the same thing again.
Can someone help me or have the same issues ?[:D]

charliemeyer007

Are you shooting good ammo loaded on the heavy side? While you had it apart did you de-burr the working surfaces? Did you apply some lube to the moving parts as you put it back together?

Cheo2012

I jus bought it , have not shot it. is a used gun. I dint de- burr, and yes I lube all moving parts.

tsr1965

Well...It's a Mossberg, so you cannot exspect much. I suspect it has to do with your gas metering system. Take your barrel off, an look to see if the gas port has an obstruction in it. Then check to make sure it is assembled correctly. There is the gas piston, O-ring, and friction sleeve that MUST be assembled in proper order for it to function.

Best

EDIT 1

After re-reading your original post, it seems this is happening when manually cycling the bolt. These are not meant to be babied. They are designed to work under full force, and full pressure. Rip the bolt back hard, and let it go. Sometimes, in the lesser guns, there needs to be a jarring to get a spring to disengage, like the magazine tube spring, etc. If it is happening when firing the gun, check the O-ring, and then the other stuff I mentioned above.

Best

Cheo2012

Thank you for the info, will call Mossberg for support to see what they said

Mossbergboogie

You should see if you can replicate this error by shooting the gun.

tocamoha

Call Havelin Sales for Mossberg questions.

Mobuck

I have a 935 and it displays these symptoms when shooting low powered ammo. Simply not fully cycling the bolt. I can't remember the internal of that gun since I haven't shot it for over a decade-gave it to Son for waterfowling but as far as I can remember, it worked great with any load over 3 1/4 dram x 1 1/8 ounce up through top end 3" mag.

Cheo2012

Thank you all for the info, I did what you said I rip the bolt back hard and it works good.!! thank you[:D][:D]