The same guy craping on a 30-06 will praise the .308 Win and the 300 win mag. They all push the same pill just at different velocity’s and of course different recoil and action size/ weight of gear. Are there better long range precision rounds ? Yes , some are much better. 30-06 sits between the .308 win and 300 win mag in velocity and recoil. I hear very few wanting to retire either of these fine cartridge chooses. I shoot 30 cal 1906 at whatever I don’t want to blood trail, it’s a killer! The best? Time will tell... or has it already.
308 lol. IMO it's good for goofing off with cheap cased ammo and that's about all I'd do with it. And by 300WM you mean 300PRC right?