Hi Ted, yes it's got a swamped rib, quoi encore? I won't lengthen the chambers, but I do see extended forcing cones in this guns future. Your right about the loads, with double proofs I'm not worried about standard loads, but you do pay for it in your shoulder. I shot a 100 clay sporting clays round with my 5lb 16 gauge using 1ounce Federals and felt it in my shoulder for days afterwards. At least with this gun I can use Winchester AA Low recoil/noise shells for sporting clays.
Steve

Approach life like you do a yellow light - RUN IT! (Gail T.)