A powder-based projectile useful in the manufacture of gun ammunition
comprising a jacket having an inner volume which is tapered from a
maximum diameter adjacent the open end of the jacket to a minimum
diameter adjacent the closed end of the jacket and a core formed outside
the jacket and having a complementary tapered geometry with respect to
the inner volume of the jacket. Projections from the outer surface of the
core are embedded within the inner wall of the jacket to enhance the spin
stability of the jacket/core combination and to enhance the frangibility
of the projectile upon it striking a target. A method for the manufacture
of the projectile is disclosed.