Got my Roller Handle today to replace that "ball" handle the 550 comes standard with. I loaded 15,000+ with that thing, and I could shoot myself for not having done it sooner. Oh. My. Gosh.... that roller handle is too cool. I only loaded 50 or so to try it out, but it was alot nicer. I would get some hot spots on my hands with that ball handle when loading 400-500 rounds, as it doesn't move, your hand has to. Does everybody else also use the Roller Handle, or stick with the ball ? Also got my Redding Competition Seater die... didn't take the time to set that up, probably this weekend. I love new toys!!