I have a 270 WSM and load 140g Nosler AccuBonds for it, and granted I am loading at the lower end of the spectrum @ 2950 FPS...and I have never had a bullet failure with it...I have taken in the neighborhood of 20 deer with it over the past 3 years ranging in distance from 46 yards (yup....took a dandy 3.5 year old 7 point this year) out to 319 yards...bullet performance has always been perfect.

According to Nosler stats, Accubonds require 1800 FPS but have unlimited upper end velocity.

http://www.nosler.com/Bullets/Accubond.aspx