I'm one of the obsessed with accuracy guys. I regularly compete in CBA benchrest. What counts is your score. To me, I don't care what "class" someone shoots in, the score is what counts. If you really want to chase accuracy, you need to start with an accurate gun, and test everything. AND, learn to tune your load. Some powders work better than others, powder charge, seating depth all make a difference. Fitment of bullet to throat is needed.
Visual and weight sorting is required. How far to sort with weight, I don't know. I aint the best caster by any means, to get enough bullets to shoot a match, so I try for +- .5 grain. What I worry over most, is the base. I think this is the most over looked, but very important aspect to an accurate bullet. Getting a gas check seated and sized perfectly square with the bullet axis, and the check surface flat and the same is not as easy as you might think. Some come out with a dish shape, some domed. When the bullet leaves the barrel with the pressure behind it, ANY variance is going to show up on paper, especially at 200 yards.