I am no expert. I would say if your only looking for a 600 yard rifle you can easily do that without spending the money. With that said, if I was that far along (barrel swap ETC) I would spend the time to do so. It really doesnt take a lot of effort to make this happen. I imagine if your having the rifle built, they will suggest you do those steps to ensure better accuracy. What caliber are you thinking? I shoot my 308 out to 600 with great success and its a factory remington 700vs with a load custom tailored to its preference. Its addictive, be forewarned.
Jason
