I've been starting to look into reloading. I've been watching a ton of youtube videos on it and reading everything thing i can. I seen lots of people with the single stage presses emphasize the need of cleaning the primer pocket before loading with a new primer. And then theres videos of the Dillon progressive presses (which i'm really leaning towards) who do everything right on the press and don't remove the casing to clean the primer pocket. Is this not really needed when reloading?