I've been looking at the longrange guns for a few weeks now, reading everything I can. What I am seeing, consistently, are heavy barrels, heavy stocks, big, long, heavy packages in general...
Have you looked into Cross Canyon Arms with Master Gunsmith Brad Stair?
He just built my dad a 300 Tejas Short Mag in a Carbon Barrel. This things a shooter, 3350 fps with a 168grn VLD and I cant say that it tips heavier then 7lbs, I should weigh it to find out. He's guaranteeing less then 1/2" moa accuracy and I've seen it shoot groups better then that already.
Nothing shoots faster then a Tejas gun)
-skp