[Montefeltro 20 ga failing to eject.]

I have a Montefeltro 20 ga that for the past 3k rds or so has been flawless.  It is always stored clean and recently began failing to eject the fired shell.  The bolt comes back but the shell stays in line with the chamber and jams the gun.

When I bought the shotgun it was lightly used and already had a surecycle kit installed. I’ve pulled the surecycle apart and it was clean, I lightly oiled it and reinstalled but the problem persists

I am leery of it being the surecycle recoil spring though I’m not opposed to replacing it.  Does anyone know if surecycles take standard recoil springs or special springs? 

Any other idea of things to check is appreciated. 

[Benelli M4 - 3 Position Receiver Extensions in stock]

Is the 3 position extension not standard on all m4’s? I have a PG stock but have the 3 position extension 

[Installing a Limbsaver 10403 on a Benelli M4 Collapsible Stock]

2 hours ago, Milspec said:

 

A guy could probably steal some of his wife’s old lipstick and lightly coat the recoil tube end, install the buttolate and collapse it allowing the lipstick to transfer to the pad.

 

clean up is easy using gun solvent, alcohol or any other solvent

[ghost loading montefeltro]

The guns that will ghost load I believe all smooth bolt bottoms,  most benelli have a groove cut Side to side in the bottom of the bolt to stop it from working