A military small & medium caliber ammunition collection

20 x 110mm HS United States

20 x 110mm HS Dummy  United States NECO 1943 20MM M21A1B1 profile view.20 x 110mm HS Dummy  United States NECO 1943 20MM M21A1B1 head view.

Details

TypeDummy
Projectilesteel, black, 1 copper driving band Projectile Markings: (stamped) H.W.B.CO. LOT-51338-2 3-1942
Casesteel, knurled choke crimp, greenish brown lacquered, 2 holes
Primernone
HeadstampNECO 1943 20MM M21A1B1
NotesThere is a wooden rod in the case which prevents projectile setback.