While cleaning and inspecting some .223 cases, I started weighing them, mostly for fun. That lead to sorting them according to weight, which is something I've never done, but I figured I would eliminate one more variable in my loading if I grouped the cases by weight. For those of you who do so, what size are your weight groups? Right now, I have a bunch of .223 cases grouped every .2 grains (same weight +/- .1 grain) and have found a pretty nice "normal" population curve centered around 93.0 grains per case. There are a few way out on the edges at 93.8 and 92.0, but the majority are in boxes from 92.8 to 93.2. So, my weight groups are divided by roughly .25 % of the mass of the case. If you group them, what is the tolerance within each group? Does it seem to matter in your results?