this 13 mm caliber stutzen let you guess https://www.dorotheum.com/de/l/9293509/#

could be a rifle cartridge using the 32 ga shotgun shell. such things were not uncommon before 1880.

a norwegian L.H. Hagen & Co. Model. Hercules in 6,5x55, SN 12784
https://auctionet.com/sv/3930628-lh-hagen-co-m-hercules-kal-6-5x55-12784