Originally Posted by
TimD
Lyman would be very happy if you, and everyone else, bought ultrasonic or rotary tumblers, and the recurring supplies needed to clean brass. Selling rotary, vibratory, and ultrasonic cleaners, tumbling media, cleaning solutions, brass separators, stainless steel pins, pin separators, ..... is a great way for them to make $$$ [smilie=w:.
You will not have any issues resizing dirty brass. The only reason to clean brass is if you do not like the look of it.
When I started reloading I did not have a tumbler to clean cases. I wiped them off and resized.