Romeo 33 Delta--it is amazing you posted about your slight modification.
This morning I looked at the plastic part that sits underneath the shellholder and saw that it was uneven. Kinda higher in the back than the front and sides. I can't see how it could have been designed that way--so I took my Buck pocket knife out shaved away the extra plastic--to sort of make it uniform. I don't know if that was the problem. But next time I am reloading a caliber that requires small pistol primers, I'll give the device one more try.
If that solves the problem and it works well, I'll post to let it be known.
But if NOT--then I am PMing you and requesting your address and will be expecting that $10.