if not mistaken the uranium solid was the last ball produced by Brunswick, the uranium hrg was poured by Columbia in SA prior to buy out. the supernova solid was a Columbia ball using M80 stock. the supernova xp test balls were poured by storm in Utah. absolutely the best ball they produced. gave me 2 300 games when it came out. Global 900 pours the lane 1 stuff currently.
as far as the best Brunswick poured balls. my all time favorite was the black raspberry. pk18 with a c2 core