JM Pro, here's what happened

[Bob Sanders]

Firstly, I'm not exactly an expert on autoloaders so care and maintenance is on a learning curve. But it looks like my mag tube spring got bound up and wouldn't push shells onto the lifter. I thought it was broken, but found it intact. I'll take it all apart, look for burrs, and clean it up. Maybe shoot some silicone spray in there.

 

[jtischauser]

^^^^this^^^^

 

[Bob Sanders]

There's an "aha!" moment. Thanks!! I think that plagued me all day.

 

[cajunautoxer]

My buddy lightly sanded down the interior transition area between the cap and tube and where the tube meets the shotgun. No problems since. He thinks there was a slight lip catching the spring

 

[Bob Sanders]

There is kind of a kink in the mag spring. Ordered a new one today. Still a work in progress. But it feeds four just fine. Going to look closely at the tube extension next.

 

[Wall]

you're not using a Nordic follower are you?
They're not for use with the Mossbergs

 

[Bob Sanders]

No, everything is bone stock. All I've done is really clean it and spray graphite in the tube. I may dress the leading edge of the follower or investigate maybe a derlin follower.