Interesting projectile

Hi. I am wondering if anyone here can help me ID this thing.

It is 2 7/8" long with a steel core. It is sheathed in brass. Diameter is 1".

Any ideas?

BTW, this is entirely projectile. The brass bovers it except for the tip. There is no casing.

!" Nordenfeldt?

What makes you say that?

Excellent call.

http://cas.awm.gov.au/technology/REL30497

Thank you.