I use a generic Decapping die (i.e. NOT the Resizing and Decapping die with a die set, but only the decapping rod in a sold seperately die) to deprime spent cases.
Then I run my 45 brass through a Thumler's Tumbler with Stainless Steel Media. I found it cleans the inside of the brass better, cleans the primer pocket, and doesn't get stuck in the flash hole. It also doesn't transfer media and dust to my case feeder on my progressive press.