Ted,
How is the gun choked? Really looks awfully tight. Would spreaders make it useful? I sometimes loosen up my IC barrel using 1 oz. of 8's or 8 1/2's in my light 12 ga. You perhaps don't want to alter the chokes, and I can't blame you.
Have to say though, chokes like that really anchor the bird! I'm alraedy looking forward to next "Grousemas" up here in Michigan.
Karl