I PC, size, then heat treat. Easier to size when just cooled from the initial bake. Then back onto the oven and quenched.

To test hardness, I add a couple of uncoated culled bullets to the tray to "bake" along side the coated bullets. Then those get heat treated along with the batch of coated. I figure that since the culls have been subjected to the identical heat cycles and quenching, hardness should be a good proxy for the alloy in the coated bullets. Of course hardness testing with uncoated is much simpler, hence the exercise.