I’ve recently heard of some accuracy issues with the 700 due to the bedding. I’m considering a 300 winmag myself. heard some good things about that one.
Again, depends on model. R700s are offered in many different configurations with different bedding.
Also, .300 WinMag is a caliber, not a specific firearm. :P And yes, the 700 is offered in that caliber as well.