Unidentified US 20mm projectile. Steel with aluminum nose ,phosphated steel, 2 polished surfaces , no markings, no driving band or seat. Maybe for a smoothbore system ?
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Might it be a penetrator? (when of steel a TP version?)
Unidentified US 20mm projectile. Steel with aluminum nose ,phosphated steel, 2 polished surfaces , no markings, no driving band or seat. Maybe for a smoothbore system ?
[
Might it be a penetrator? (when of steel a TP version?)