I have a Krieghoff Ulm Primus hand detachable sidelock O/U combination gun in 16/70-7X75 SE vom Hofe. The shot barrel is fitted with a full length Keller & Simmann Einstecklauf in 6X52R Bretschneider, which is the .22 Savage HP necked up or the .25-35 Winchester necked down to 6mm, giving me an instantaneous choice between short range and long range cartridges.

It hammers whitetails.

It is also fitted with a pair of double rifle barrels in 9.3X74R, making it a truly versatile firearm.