In the late 1960s to middle 1970s there was a French company that made bullets from bronze on a screw machine. I remember the name as "Mystique", but can't find anything on line about them. They were designed to be 'penetrator' type ammunition; for use against vehicles, barricades and body armor. The bullet was made with a non-curved, spire point tip; much like the old 'metal piercing' ammunition of prior times.
Turns out they were loaded to European pressure levels, which were - exciting, to say the least. And then, shortly after, the Leftists in Congress declared them - as part of the type - 'cop killer bullets' and therefore illegal.
The lightweight alloy bullets are prior to my experience. Odd I haven't read about them.