I shoot a Krieghoff Trumpf Dural Drilling, 16x16/7x57R with .22 mag insert barrel in the left shotgun tube. It is equipped with a Kahles 3-9 scope in claw mounts, instantly removable and replaceable with extreme precision, always returns to zero. Same with the Krieghoff Semper insert barrel. I just used it last week on a backpack hunt for grouse and bear. It is light, handy, and the ultimate in versatility.
I also have a Merkel BBf ( o/U combination gun ) in 16a. over 7x57R. It is equipped with a Hensoldt 4x in claw mounts. Very trim, accurate, and handles like a fine bird gun should, because it is also equipped with a second set of 16/16 barrels 28" Mod/Imp Mod. I have used it for combination grouse/rabbit/deer hunts with the combination barrel set, and shot my fist and only wolf so far with it.
Lastly I have a Heym BBF in 16ga./ .222 that i use when calling coyotes in close cover. It has a 2-4X scope in claw mounts.
I recently sold a Sauer pre-war drilling in 16x16 /8x57JR that handled like a fine bird gun. The rifle barrel, although never used for big game, was a comfort while hunting ptarmigan in the high alpine of BC grizzly bear country.
I have owned many other combination guns and after being frustrated by them I got rid of them all. Poor regulation of barrels, poor fit and finish, and poor function plagued all of them. These German guns are keepers. There is a world of difference between cheap rough American made combination guns and the very fine pieces of functional art made by the europeans, especially Germans and Austrians.