I'm still curious as to why specifically a 300 WM. Do you have experience with one? Do you reload?
You state you are new to the precision world, have you tried other calibers? Not trying to pick a fight or anything, but there are other calibers that are cheaper to feed and easier to learn on. What specifically is your intended purpose for the rifle? Is it just for target shooting?
After reading this thread, those questions have either been asked or alluded to. I think more information is required before anyone can actually recommend anything.
Again, not trying to start anything, just don't see enough information to formulate a proper opinion.