French 12.7 X 110

I'm assuming this is another of the necked down 20mm rounds that were experimented with (head is 24.7mm like the 20mm Hispano).

No headstamp.

I understand it was from tests done in the mid 1980's.

Does anyone have any information about this.

All inert/primer oiled/no core in it now etc.

Dave.

I got another of these yesterday, fired and showing the marks from the fluted chamber.

All INERT etc.

Dave.