Received my Gamegetter in the mail last week already.  It has 15" barrels and the 410 barrel has been bored out to 2 1/2 inches for modern shells.  It performed very well at the range; better than me.  I think I had some trouble being consistant with the aperture sight.  410 slugs were touching at 25 yards about 2" higher than the group for the 22 barrel.  I shot the open sites for the slugs, perhaps that was why it shot better for me.  I hope to take it out in the next few days for a hunt.  It should take out ptarmigan and rabbits pretty well.
Bin quiet here on the combo gun front.  Just breakin' the silence.
YKD