I believe all complaints about inaccuracy with the WFN have been with the heavier weights when shooting at lower velocities, or guns with aren't fire lapped, or if the gun has serious cylinder to barrel missalignment, with this last issue probably bing the most comon cause of low velocity inaccuracy.. The heavy bullets have to be driven at near max velocity. In 50 cal, a 400 gr WFN is quite short and stabilizes easily without full loads, if it isn't knocked out of alignment on takeoff by bad internal toleranced of the gun.