In your cereal? In your powder? When priming? Seems relevant. . .. . . I’ve began to get some brass shavings when loading.
Ive seen that on my Dillion also. If the brass you are using has a tight primer pocket..the press is shaving it out when you set your primers. Ever so slight bit.
How does the handle feel when you push it forward to seat the primers?
Wet tumbling will normally have some fine brass shavings in with the dirty water. If your not rinsing the brass well enough you will get them where ever the brass ends up. It comes from the pins burnishing the sharp edges on the brass. If you dump the cleaned brass directly on a flat clean surface you may see some. All my rifle brass is annealed after cleaning, then trimmed (weather it needs it or not). By the time it makes it to the press all of the small pieces of brass has been removed. May want to take your brass to a separator and give it a spin/shake to see if any brass shavings are currently present.
If the brass you are using has a tight primer pocket..the press is shaving it out when you set your primers
Your picture makes it pretty obvious.It’s at all stations, but mainly seating and crimping