JM Pro, here's what happened

Bob Sanders

Well-Known Fanatic
Joined
Feb 9, 2013
Messages
1,660
Location
Utica, KY
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.
 
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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
 
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.
 
you're not using a Nordic follower are you?
They're not for use with the Mossbergs
 
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.
 
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