between 1860 and 1870 24 ga and 28 ga bullet cartridges were probably the most used hunting rifle cartridges in germany. the paper shells were allways cut down and it seem 30/33 mm was common like 40 mm long shells. they shoot then very low powder loads in muzzle loader and also in the early cartridge guns. a double rifle was an expensive thing like it is today so you see many combination guns having a 24 or 28 ga rifled barrel and a 20 ga shotgun barrel because in this combination you can give both barrels the same outside diameter.

the later 24 ga bullet measure .622 what is oversized but you gun had an own mould than

RWS 63mm and 40 mm long pinfire brass case, no 33mm

but DWM still offer a 33 mm long 24 ga center fire case

Kugelpatrone means rifle cartridge