Concise, OK, I'll give it a try..............
Yes! As mentioned, bulged cases are the results. Damaged ones are an indicator.
For critical loads, ones at the top of data for slow burning powders, having enough crimp is important to consistent ignition.
Two steps is the answer, IMO. Even before I got a progressive, I did it. Now with either the Square Deal B or the XL650 I do it by design.
At the seating step, I only close the case mouth back to straight, next step, crimp only.