Goodgrouper,
I'm not sure what the RCBS Junior press looks like, but except for the Forster Coax press, there's nothing that can out perform the Rockchucker press for leverage, and the O-Design is as solid as a rock.
The thing that gives a reloading press strong leverage is not just the "cam over" feature. It's compound leverage, and an uninterupted (complete) full travel stroke to the top. The Rockchucker has 3 fulcrum pins, and that provides a world of improvement over any press that only has two fulcrums.
- Innovative