Re: weight sorting brass help
I recently sorted a bunch of 7mm Rem cases, Winchester brand. All had already been sized, and the primer pockets were uniformed and the flash holes deburred. Theoretically they were the same.
I ended up with 3 different batches of brass based on how they weight out. First is 226-228 grains, second is 230 grains, last is 232 grains. The lower weight batch had the most spread and the others were relatively consistent. The 230 batch was especially consistent.
I don't expect much difference from them in performance in real life, but I'll stick with one batch at a time when reloading.
Hope that helps