Wow, quite the response
The first guesses were correct. These are for the holy shotgun shells from "Constantine". Will need to have some stuff lathed for them and practice applying the etchresist laminate as it is faaaaar more challenging to get it on round objects than flat objects like the lighter pieces.
I finished the graphics in my last run of nightshifts, so i might do some test etching in the coming weeks when i have more time and my finger hurts less.
You should take on the gun itself after you do the bullets, I've yet to see one make on here.
I just never hear of brass 12 gauge shells. I always picture them as a plastic.