The rifle in this photo is a 27 Nosler with a 5-20X Huskemaw scope, built by Hill Country Rifles. It is a tack driver, fast, and capable of a 1000 yard shot. It tips the scales at 8.7 lbs., but some compromises were made to keep the weight down to a reasonable level.
All of that said, I never intended to shoot anything near those distances, but rather have a great rifle capable of making 300-400 yard shots more reliably.
You could build something similar in a 6.5 RPM (probably a bit lighter) and have the same capability. When you make choices about stocks, barrels, scope, and scope mounts…you should have a plan and vision of what you want at the end.
The factory Weatherby Backcountry 6.5 RPM is actually pretty close. It is too light to make a 1000 yard shot, however (my opinion).