Most of Bemans and Eastons carbon arrows are +-.005 inches. Which is not very straight. Everyone makes a carbon shaft that is +- .005 or .006 but Easton and Beman do not offer anything striaghter unless you get a carbon/ aluminum arrow. Beman even has some as far out as .011 inches.
Beman ICS Classic, all carbon straightness +/-.002"
Beman ICSCamo Hunter, Carbon, +/-.002"
Beman ICS Trebark, carbon,+/-.002"
Beman ICS Hunter, Carbon,+/- .002"
Beman Carbon fiber bonded to aluminum 7075 core tube, +/-.003"
PSE Carbon force extreme, carbon, +/- .003"
You are correct about the eastons carbon, but the bemans aren't all that bad if you pick and choose, they do have some that are terrible.