I don't see the point,at least not in a modern auto when 20's handle and carry so well.
A Benelli ultralight 20 is already to light for me.
I don't think I could ever consider an upland gun "too light" but I am also thinking the 28 doesn't bring enough to the table to justify bothering with a 28.
But if I'm wrong in this thinking I may try a 28.
Travis
I think it depends on shooting style but I'd rather carry a 6 pound 20 gauge than the ultralight in Montana. A little extra weight for more shootablilty is worth it form me.
My dad is small with shoulder issues and weight can be an issue for him. He always said his 20 gauge ultralight was his last shotgun. He bought a 20 gauge super sport for clays and now it's all he shoots for prairie birds. He shoots it significantly better in the open out your way.
If your strictly a snap shooter the light gun might be better.
