Do they offer an inletting service whereby you send in your pattern, already glass bedded for your rife, and they then use your pattern with their wood.
I don't see how they could mill a crooked barrel channel. Sounds to me like they are using wet wood and it warps after inletting.
More likely sloppy machine set up.
I don't see why Richards can't get a CNC machine to do more accurate inletting. Boyds look more like CNC machined, not sure about what they use.
Or at least set up their machines better.
DF