I have had great results with the Nosler custom brass. I never really finished load development, but with this brass most of my 5 round groups were about 0.37" at 100 yards. I had one 4 shot 0.17" group and then a 5th shot spoiled my fun.
As far as who has the most consistent weight, I did a test on the Nosler brass and a few cheaper brands. I weighed 20 pieces of Federal, Winchester, Igman, and Nosler brass - all to 1mg (roughly (0.02 grain). The Igman ammo is not accurate at all, but the brass was much much more consistent in weight than the other brands. Nosler then came in second. I would have liked to measure case volume and neck uniformity, but I just had too many other projects on the go.