Case id

[Big Dave]

Bought today,I think it's cut but who knows ,no headstamp ,length 182mm ,rim diameter 56mm and neck diameter 44mm, been a piece of trenchart at some point ? A couple of holes in the side and a large drill to counter sink the primer pocket ,nice and heavy and the rims quite thick.Any suggestions/ideas welcome

 

[pzgr40/42]

Perhaps a shot casing for a punt gun?

 

[Falcon]

I have had something similar before which I thought to be an unfinished 2 Pounder AA gun case.

Does yours have a flash hole?