The .264 Win. Mag. Westerner was invented to be the perfect flat trajectory all arounder for western game in 1958. And then, along came the 7mm Rem Mag in 1962 and blew the established western cartridge out of the market. That says a lot about competition of the flat shooting rounds.
The .300 has not yet blown the 7 mag out of the market, but scope evolution seems to have reduced the popularity of flat shooting trajectories.
I stilll like 7 mag because they are good in the wind and don't kick too much.
