I agree with Jim.
The rib should make no difference as it is configured that way to facilitate the POI of the shot string when shooting flyers.
Remember the old adage.
"See bird, shoot bird". No matter whether flesh or clay.
You buy a gun that is set up in configuration to be the tool of dropping the bird when you do your part.
If you are noticing the rib when you sight the bird, it is not the gun that is a problem. It is your inattention to good shooting practice that is at fault.
If the gun fits reasonably, you should not take notice of the rib. You should have all your attention on the target.
Now that I have said all that---it was said gently.
Use this shooter as it was intended and have a grand time.
Best,
John
