Re: stainless steel pin media
I'll admit that pistol cartridges are not the problem with this but rifle cartridges are as there is no belling.
As for primer pocket cleaning, I NEVER clean pistol cartridges primer pockets and only clean rifle primer pockets when I trim after as many as three of four reloads. I can not tell the difference between cleaned and uncleaned primer pockets for primer pocket seating but I seat the primers on the press which has huge leverage which might hide the difference. I find the residue is on the bottom of the pocket, not the walls of the cavity. It does not make sense to me that the force to insert the primer would be any different unless it is the bottoming of the primer in the pocket. But anyway, we all get to do it the way we want.