Hi guys, this is my first post here. I got the urge to put together a ( starter bench rest gun ) after years of shooting all types of other guns and competitions. Lately It's been big bore cast bullet shooting with Hi wall, rolling block, sharps, etc. What brings me to the bench rest is the fact our private range has a shooting house set at 600 yards, and can go out to 800 yards with a portable bench. I would love to build a 600 yard bolt action rifle. Now....I don't want to invest a ton at this point for a gun that will not see any competition. I do have a new Remington 700 stainless receiver I would use. My thoughts were, 6BR, cut rifled, Mcmillan stock, jewell trigger. So for shooting at 600-800 yards, am I even close to what I need and also what contour barrel will a 700 handle, twist, etc. Keep in mind that this shooting range can get pretty windy at times, so I am leaning towards a somewhat heavy bullet? Please feel free to chime in at this point!!!! Chamber cutters ,FB length and die questions to follow!! Thank you for your time, loco.