I noticed in a picture of a 650 earlier in this thread than they also have a blue stool, now I've got to replace my chair and get a blue stool.
I've noticed primer feeds sometimes causing an issue. I've never had any issues but I still use the mega flipper tray and not the auto filler to load the primer tubes, that might be why. I also, at the end of every loading session brush the turret and primer slide area clean with a clean "acid brush" commonly used to apply soldering flux in plumbing. They work perfectly and each of those cheap brushes lasts maybe 15-20 reloading sessions, before I retire it and start with a fresh one. I buy them at just over .11 each by the gross. I'm on my 1st gross since 1988-89. Keep the press clean, properly lubed and adjusted and you will never have a problem.

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Certified NRA rifle instructor