Would this be fixed with a Sizemaster Bob? I have a 12g Sizemaster and I had that issue but once it was fired in that Parker they didn't need to be resized again. They weren't Fiocchi though, I believe they were once fired Cheddite. It was only in one VH I have that gave me an issue with that hull. I did not fire the Cheddite they were given to me so I have no idea what chamber they came from and if they had expanded to fit that chamber. I hope this makes some sense.

Bob, I think the solution for me is to keep it simple. I'll use up the Fiocchi I have and discard the hulls. Going forward I stockpile the RST for the 16 ga. It seems the best recipes for 16 ga are for the 2 1/2 hulls.
Thanks, Clark