.22 ish ? CAD (no clue)

7.8 rim; 24.9 length, 5.7 mouth “rim”

? masking taped base ??

right in Fede’s wheel house

The Forum is undefeated with the multiple ID’s I inquired of yesterday…except for this one

no clues ?

I can provide better photos, weight…but I no longer have access to x-ray (retired)

It looks too much like a cartridge…not to be a cartridge…agreed ??

It almost appears to be a type of a blind rivet.??