My Bockbüchsflinte in caliber 12/70-7X75R SE vom Hofe has a full length Einstecklauf in caliber 6X52R Bretschneider, which is the .22 Savage High Power (5.6X52R) necked up or the .25-35 (6.5X52R) necked down. The barrels are regulated to shoot together at 100 yards, so I have a choice of short range or long range cartridges immediately available. This is a combination known in German as a Bergstutzen or mountain carbine. Either one is capable of dealing with a white tail deer emphatically, which is all I require.