It works!
As a matter of fact I tended to neglect it as a shotgun for quite a while--so decided to use it this fall. Worked great with Bismuth loads of #5 shot on both pheasants and mallards!
Might also mention that I prepared for big game hunting with the High Wall by shooting prairie dogs, as I often do with iron-sighted rifles. Took them out to 200 yards, so was pretty sure it would kill a deer....