From what Ive seen, and I reload alot for a lot of different calibers and makes of rifle, is that any production firearm will out shoot the shooter if a few conditions are met. Sight mounting and alignment has to be correct with good optics. Cheap optics can make great rifles shoot piss poor. Stock to action/barrel fit is critical. Bedded or floated pick what you like just make sure its correct. Develope the load for your rifle. Accuracy will always be better with bullets tailored to your rifle. And make sure the rifle fits you and doesnt have tremendous trigger pull. That being said someone mentioned Remington 700 sendero earlier. Id take that rifle in a 300 win mag any day. I own one and by far, even against custom 300's, best shooting 300 win I have ever picked up.