Any Ideas What It Is From?

Not even sure if it is a projectile, found this in a mates display cabinet this afternoon and neither of us have a clue what it is, So anybody have any clues?

Nose and body are nonmagnetic,
the core is magnetic.
Over all length = 3.65"
Lower portion length = 2.60"
Front portion length = 1.05"
Diameter = 1.295" (under nose)
Diameter = 1.305" (nearly at the base)
As you can see it has had a rough life at one time so I can not measure it accurately at the exact base, so I am assuming it is not quite parallel but maybe it should be?
Weight = 14.05 oz. (398.4 g)



No ideas anybody?