That's one of the things about die sets and a progressive press. Sizing and decapping is first. How do you trim, tumble and pocket clean. I generally like to size at the priming station because it stabilizes the case. If I'm processing large batches I set up the progressive with the case feed and just decap before trimming and tumbling then pull the pin and the first station sizes and primes. I'm wishing I would have gone with a 4 station press because the 5 stations are way more complex.