Again an ID request.
Here for a 5.6mm (or something alike: .22, .223, 5.56mm).
Case length is 51.6mm and head diameter is 11.9mm. I assume it to be a necked down 7.62x51 (or one of its predecessors?).
OAL is 66.5mm. The unusual part here is the electric primer with a green insulation. The FMJ proj. is magnetic. Weight is unknown as the cartridge was drilled.
HS reads: WCC 54
I tried to find it in HWS 3 but was unable to do so without reading the whole book.
Anybody to give a quick reference?
Thread title ammended to reflect ID given during the discussion below.