I've done 1000s as well. I sort them by headstamp, boil and dry in the oven as per the Corbin book. I bake the clean cases for a half hour at whatever my oven's top setting is. It says 600.
I use Winchester and Lapua cases almost exclusively. I get my cases from an inside range whose members shoot comp. Hence, the Lapuas. They practice a lot with Wins for whatever reson. There are some Federals and Rems but not too many. I sort everything but I don't care for Federals. They are made in different places and I find them harder to work with.
Regardless of case, despite the oven heating, I still find that maybe 20% crack IF the final weight is going to be 55 grains or less. This is because you end up with OTs whose tip is unsupported. IOW, there is no lead just jacket at the end. About 20% crack. Since these things are virtually no cost, I make 60s and 65s with the RF cases. I'm hoping that 57.5 grain bullets should have lead to the end (approx.) and therefore won't crack.
For 35 to 55 grains, I use J4s.