I never have to spin my brass in a seating die, and never see more than .0015" TIR in runout. I seat with Forster seaters 85% of the time, and hate Redding anything. But I've heard this argument manytimes over, and proved my point in a Shadowgraph. If you gotta spin the case you have something miss aligned elsewhere. Check your brass before you ever try seating a bullet. The results may scare you.
Someguys size their brass without a sizing ball installed. I always use mine, but that's each and everyone's choice. If you size the neck unsupported you have cause for error. The neck should be the very last thing ever done. Another thing with seating bullets is micrometer heads. Hornaday heads are junk. There's about half the backlash in a Forster seater than a Redding if you change seating depths a lot. Some folks think the Forster seater is the best. But I won't go that far. But I will tell you there's very little difference between a Forster seater and a Wilson in an arbor press
Lets see we're having trouble releasing the sized or finished round. There's a 1/42 set screw that has a point on it (reached from under the bolster plate). Adjust it so that it just retains the case , but is still a little loose. The sliding jaws will get a little dirty if you keep a lot of oil on them. I prefer powdered graphite. My jaws have not been apart in the last couple years, and then it was just to flip them for a couple hundred Herett cases. I do take a few minutes to lap a new set of jaws on a wet stone, but even then I have not lapped a set in ten years.
gary