Bringing new calibers and cartridges to market takes a lot of work, with hit-or-miss success.
It could be argued that the 6 mm PPC, which was created in the mid-1970s by Dr. Louis Palmisano and Ferris Pindell, began the evolution of the precision-rifle cartridge. The 6 mm PPC was a .220 Russian cartridge case necked up to 6 mm.