Some modern turned cases of old cartridges?
#1 .577 SNIDER
#2 .450 No.2 Carbine
Probably British Made…North Devon F. Services NDFS…in 1970s and 80s.
@DocAV4901 Maybe it’s something like a .58 musket or carbine?
ID of the case is .49 so might be closer to a 50-70 ?
Can you show pictures of the headstamps?