I bought this recently and I wonder exactly what it is that I’ve acquired. It’s a dummy cartridge, chromed all over with 6 flutes, an empty Berdan pocket and a single knurled ring between the extractor groove and the start of the flutes. The bullet, which is slightly magnetic is held in place with a heavy coned crimp. the headstamp is ‘K’ at 12 o’clock with ‘.30’ at 6 o’clock.
Is there any significance to the knurling? Is there a type designation? Any idea when it might have been made and for what?
Happy collecting, Peter