There is also a lot more room for error in using a progressive.
I'm not sure I agree with this.
I think that a progressive press can turn out a lot of bad ammo in an amazingly short time, due to its production rate. However, if the instructions are followed and each stage is set up correctly, there should be no increased error
per stage.
After all, the same dies are used, single stage or progressive, and they are set up the same way.
What seems to happen is that 100 cases are fed through before the user realizes the seating depth was wrong. He checks the ammo after it falls out, skipping the all-important step of setting up the dies as you go.
Or, as I just read about, he decides that he can interrupt the process and adjust powder charge "on the fly", resulting in an uncharged case.
Starting with a single stage makes you go slower and you actually learn more about reloading.
From some of the posts I've read, I don't see this happening. If someone wants immediate gratification, a single stage is no guarantee of learning. Slow does not necessarily equal safe.
I also read about an
experienced reloader who managed to mess up a powder charge / loading block operation, used with a single stage press. All he did was get distracted and the result was a double charged case.
As a shooting / reloading community, I believe we should stress the importance of learning the
process of reloading and move away from the tiresome single stage / progressive debate.