My SuperSport will, if dirty, on occasion, lock the bolt back with a live shell on the carrier.
My fix is:
-Pull the trigger group,
-Spray clean,
-Lube lightly,
-Reassemble.
(Back to like-new!)
You're confusing an inertia trigger switchover system of an O/U with the Benelli "Inertia Driven" system for autoloader bolt lockup and cycling. Different animals.
A few days ago I shot my Benelli in a snowstorm (I know, I shouldn't have!) Well, as I lined up on H1, a snowflake went in the barrel and immediately caused so much rust that the barrel was obstructed as I pulled the trigger and the gun blew up!
Do you think Benelli will replace it?
rodburner, you said "I want a bigger pattern." bigger than what? You don't know what size you have now. Establish a baseline so you can see the difference (is what I'm saying).
Your gun is shooting high if you're seeing that much rib that it is a "ramp". Establish the center of the pattern then shim the stock down; repattern and adjust as necessary.
You'll get it (unless your neck is 10" long!)
Good luck and keep us posted.
Pattern it appropriately with paper to establish a baseline, then make the appropriate changes and pattern again. It might save you a lot of tail-chasing! (You can't even be sure of what you're trying to change!)