Jetinterior guy,
As explained earlier, sorting by weight really doesn't do a great job of predicting capacity unless the brass is all from the same lot from the same maker. You really want to sort by headstamp first. Then weigh them and you will find each tooling set that contributed to the lot will have produced a different bell curve peak. Just look for several weights that have higher numbers of cases in them than the others. 'there may be four to six. Each one of those weights should be a good candidate for keeping together for match loads. You will probably find a few outliers this way, too. two or three that are significantly lighter or heavier than the rest. Put the 15 lightest and the 15 heaviest together and load them and shoot a group with them and chronograph them. This gives you the worst case results for letting the brass be mixed up. Take the thirty most similar and repeat the exercise. If you can tell a difference you'll know how much the weighing is getting you.
The value weighing has is often swamped out by charge weight and bulk variation. It tends to be less important than eliminating runout and getting primers correctly seated and find the best bullet seating depth for your rifle. I say "tends" because every time you make a rule like this, someone whose gun's favorite load is an exception turns up. So, never say never, but don't have high expectations for making a big difference until you can prove it does.