Well...
I would have Lapua make 300 RUM brass
I would have a BAT action or somtihing similar in a repeater setup...
gonna shoot the 240's
30" fast twist Schnieder Polyagonal or Rock Barrel..
Flutted ( for the cooling aspect not weight saving )
OPS Inc. Break
An A5 or Tooley MBR stock heavy/sniper filled. And able to cycle loaded cartridges from the mag. Chris would have to make a custom mag I'm sure..
If in the A5 then Badger metal, rings and base...
not sure on Optics.. Nightforce or USO in a scope with up to 30X available just in case I get that early morning shot with No mirage!!