My Benelli Super Nova Tactical is PI*SING ME OFF!

I believe I've found an easy method to fix this issue. I came across this thread when I was researching the problem, so I decided to post my solution.

I experienced pretty much this same issue with my new-to-me SuperNova Tactical - After loading shells into the mag tube, the first round out of the tube would often get ejected below the carrier and fall to the ground. Bad news if you need the gun in a stressful situation! In my particular case, I could often eliminate the issue by pumping the gun very aggressively, but why should I have to man-handle my expensive Italian pump-gun to make it work right? Additionally, the issue got worse if the gun wasn't level, for example when shooting clays.

After pulling the trigger group assembly apart, I figured out a solution.

Here's the video I made:

For an exploded parts diagram as well as part names, go here:
ftp://ftp.benelli.it/Public/UM_SPL/G0262600.PDF

The carrier clicks into place when pushed upward to load shells into the mag tube. I found that this click was the bolt stop cap slipping past the notch on the bolt stop tooth. When the carrier is pushed down, either by the bolt or manually, it should click into the downwards position as well, and this indicated that the bolt stop cap was slipping into the notch on the bolt stop tooth. The problem is that in my particular SuperNova, the bolt simply doesn't push the carrier down far enough to move the bolt stop tooth past it's "click point" on the bolt stop cap.

After some careful examination, I determined that I could make the carrier and bolt stop tooth assembly snap into the down position sooner by removing some material from the bolt stop tooth's notch where it interfaces with the bolt stop cap. Where I removed material and how much is detailed in the video.

On my shotgun, the carrier will still snap into the upwards position with the bolt forward. I think you could remove a bit more material still, and eliminate this behavior altogether. This would make the carrier operate like most other pump-gun designs; e.g. Remington, Winchester, and Mossberg. The important thing is that by removing a tiny amount of material from one of the notches on the bolt stop tooth, the bolt now pushes the carrier past it's "click point" when moved to the rearward position and the carrier will snap to the lowered position every time, ready to pick up the next shell ejected from the magazine tube.

I actually like the fact that the carrier snaps into the upwards position when loading shells, as it speeds up reloading. I think this is supposed to be a "feature" that became a victim of tolerance stacking: some SuperNovas never exhibit this issue, while others have problems worse than mine.