l-dog:
I have a Lee turret press, but I believe the ram set-up is the same for all non-progressives. There is a wire retainer (sort of like a wire c-clip) that snaps around the ram. It is the edge of this clip that keeps tension on the shellholder while it is the ram.
If the clip is severly bent or broken, it may be jamming up the shellholder. Theoretically, you could also have some other debris stuck inside (like a piece of spent primer that worked its way in).
You'll need to pull the shellholder back out and check the ram. A flashlight will help. And if you don't already have one, download a manual for your model from
www.leeprecision.com. I think the retainer clip simply snaps off, but check the manual first.
Let us know what you find.
dogfood