It is some type of practice round by the looks of it. Measurements will help the more experienced
Ask the user zwerge. He knows for sure I he do not find this thread himself, send him a PM with a link.
Looks like 20 x 138B german drill round.....Pete.
JEDEM DAS SEINE
What did i say
thanks thanks thanks everybody
and especially zwerge,but this one has no grooves and my picture is
German 2cm Flak drill catridge.
Yep, German 20mm Solothurn drill cartridge by the looks. However, without measurements this is just and educated guess. With measurements we could be 'positive'. Used in Flak 30 and 38 AA guns.
(Thread moved to correct forum for you)
This is a tool cartridge to adjust the headspace on the Solothurn cannon, a "Verschlussabstands-Einstellpatrone". A pretty rare find.
Info from forensic on the IAA Forum.
British Military Smallarms and Ammunition
Collector, Researcher and Pedant