[caz223]

My primer feed works 100% without the weight with CCI primers.
With Winchester primers it's more like 98% with the little weighted stem.
I think they vary in size more.
My systems are spotlessly clean because I decap and resize on a loadmaster, then ultrasonically clean the brass, and give it a spritz of one shot before it touches the dillon. I like it that way because there's almost no resizing effort contaminating the 'feel' of the rest of the processes.
Also, no dirty primer pockets, and no media in the flash holes.