For really long range, I'd get a hot 6mm or 6.5mm like the 6X284 or 6.5X284. You need a high BC and MV for 1000 yards!
You might also consider the 25/'06 and the 257 Weatherby Magnum in a heavy barreled varmint rifle.
Last edited by eldeguello; 07-24-2009 at 07:04 AM.