Check out my post in another thread where I quoted you about this problem:Thank you for your response, the first thing I had made sure of was that I was getting a full stroke, the hole in the disk actually pushes out farther then the hole so im sure its fully engaged. However of course I will check again. I will check to make sure the bottom hardware is all tight. I do know that there is a little wiggle side to side even though everything is as tight as I can get it by hand. When I've taken the hopper off to change the disk hole size I notice that there is powder that is left underneath. Almost as if there was a gap between the plate and the disk itself. Wasnt sure if that was normal or perhaps due to the powder type or what I wasnt sure. I will take the whole thing apart. Empty the hopper and clean everything. Perhaps there is something that is catching the powder before it can drop down into the disk hole. I will let you know how this goes
https://www.thehighroad.org/index.p...ding-room-today.830858/page-465#post-12169792
If you are using the chain to activate the disc measure, I have found that can be problematic, and I use a spring for powder measure return (not the spring from Lee).
With that spring the drop tube follows the expander all the way down, following the case.
There's never a gap between the drop tube and expander (i use risers too).
Here's a pic were you can just see this spring in the bottom of the image: