Shotgun shell from ww1 : r/ww1

Can anyone identify the WW1 gun this shell would have been used in

Found in an old crate of WW1 and WW2 stuff I inherited from my dad

This was made by a U.S marine using actual spent artillery casings

Now I know why I can go 100-0 real quick : r/WorldOfWarships

What gun fired this mystery WWII era shell casing found in

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