Re: New 300 Winchester magnum
+1 on the sendero. They are pretty good from the get go also! After the bbl is shot out, a good smith can really maximize its potential as has been pointed out already.
Long range shooting is a process that ends with a result. Once you start to focus on the result (where the shot goes, how big the group is, what your buck will score, what your match score is, what place you are in...) then you loose the capacity to focus on the process.