Buddy shoots a 6.5x47 and it is a really nice round with the 123gr Scenars. 6BR is a good round to and most are now using the 105gr Berger Hybrids in any 6mm config.
For many the 6BR is a great choice for out to 600yds F-Class and some take it to 1000, but the 6BRX, XC, or 243Win will provide more velocity. At 3000-3100fps the 105-115gr class bullets will shoot a couple inches inside the 6.5's until you get out a bit passed 1000yds.
6.5x47 is right in there with the 260 and 6.5CM as far as performance it's hard to tell. The 6mm are getting more and more popular now though in the competition world.
6x47 would probably be the best of both worlds for you!
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