Thought I replied a few days ago.
The internet must have eaten my homework.
Short version:
I did that a few years ago with a Lee shell holder in an RCBS priming tool, at 3 am, and scared the crap out of the whole household. BANG!
They thought I had shot myself.
(Lee shell holders suck. They're bad in their own tools, and even worse in other brands of priming tools.)
Lee makes 26 sizes of shellholders (some fit multiple cartridges, sometimes losely) while RCBS makes 54 that all fit properly.
When I noticed the wobbly freeplay, I stopped buying Lee shellholders.