Both my 16 gauge SxS's have concave game ribs. They both sink in the middle, so I suppose they are technically swamped ribs.
I'm currently trying to figure out why I shoot one a lot better than the other. The guns are less than an ounce different in overall weight. I went to some expense making sure the fit and triggers were as identical as possible.
I've narrowed it down to either this; The one I shoot best has the teeter-totter balance point 5 1/4 " ahead of the trigger and it's barrels are 1.6 oz heavier. My other balances 5" ahead of the trigger.
Or this; The one I shoot best has a matte black finish on the game rib that stands out visually, and the one I shoot less well has a blued rib that tends to blend in with the barrels.
You can't "aim" with a game rib, but I tend to think the contrast of the matte rib feeds info in my periphery.
I've even considered smearing something on the shiny rib to give it some contrast and wish I could somehow make it a matte black.
Or, it's simply a faster gun for which I gave it credit and I'm sluffing it.
I dunno.
