20mm/50cal ID help

Says French, head is same dimensions as hs404 20x110 but it’s shorter. No headstamps.

Found this, but this was for a 20x102 necked down

Some possible information-

The photo missing from Will’s post:

French 12.7 X 110mm: http://www.bocn.co.uk/vbforum/french-12-7-t44694.html

Brian

Thanks!

Logged it as
12.7x110 French XPL - .50 based on 20x110 H-S case