Find of the day, what is it?

This one is unknown to me (a lot is!). Overall length is about 20,25mm (.797) and diameter 7,97mm (.313). First thought it was a blank but after some examination, I think it could be an igniter of something.!
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Hi Dirk,

It is a Wild Cat brand “8 mm Knall” cartridge made by Toffoli in Italy. Some examples are marked “WILD CAT 8 mm” in the front of the case mouth.

In this earlier thread you can find a picture of a box and patent: Some SLICS finds

Regards,

Fede

Italian, of course as it was a gift of an Italian friend, visiting me today.

Ciao, amico!