The following is the opinnion of someone who does not see the point of restocking a rifle, unless one puts forth the small amount of effort to make sure that the "working bits" are secure, stable, and free of conditions that will adversly effect the accuracy of the gun, when the stock change is complete. and is just that, an observation.
there is no stock on the planet, intended for a bolt action rifle that is a "true Drop in" it's either going to need the inletting releived/finnished, or on the other end need to be at the very least skim-beded so that things at nice, tight and "right", or, more commonly and more conducively to accuracy, BOTH ......
both wood and all the syth products out there expand and contract to some degree, esp during the production process on the sythetics (the material contracts slightly as it cures). so unless the stock maker can predict EXACTLY how a stock will change dimensionally between the time the stock is carved/molded, AND knows the exact dimensions of your gun, there is going to be extra work beyound, get stock, swap new for old, go shoot.
but then again some folks just want a prettier or just "different" stock on their gun, and do not need a stock that fits their action/barrel in a "like a glove" fashion.