I wouldn't have thought casting bullets made that much economical sense unless you had oddball sizes used in blackpowder guns.
....
Back in the day, casting was the only way to practice economically.
Lead bullets were sold by speer and hornady, but they were horrible.
Good cheap lead bullets didn't become available until the 80s.when IPSC became popular.
Prior to thàt, the 2700 guys were casting hg130 short nose swc. They were infamous for malfunctioning 1911 pistols.
When ipsc took off, the hg68 was discovered to be a better all around bullet.
Then small local entrepreneurs like me began manufacturing the #68 for the combat crowd.
Today there are many small bullet makers which made it easy to buy cheap bullets.