A lot of well built Weatherby rifles shot factory loaded ammo very accurately. My custom 270wby shoots factory Weatherby 140AB ammo better than 0.2 MOA...
Nimrod, I'm also shooting a 280AI Kimber Montana 84L. Any updates on your experiences with the scirocco?
I'm getting excellent results with 140 Accubond and 140TSX. Not as good with 160 Accubond, though, and so I'm looking for some options that shoot well with heavier bullets.