6.5-300 wby mag or 28 nosler would be my vote. Stepdad just had a long range 6.5-300 wby built and I'm in the process of building a 28 nosler. Gone have a broughton barrel with spiral flutes, jewel trigger, mcmillan stock, curtis axiom action, and topped with a zeiss victory v8 4.8-35×60. If it shoots half as good as my stepdads I'll be happy. His is very similar but just has a Remington 700 action with a lot of work stock Remington trigger with work and a bell and Carlson stock. We haven't shot put to 1k yet but it groups very well at 600.