By unfired, I assume you mean factory fresh, never fired. I have a French resizing die made by Manufrance over 50 years ago and as soon as I find my elusive dial calipers I'll measure the ID and compare with what you have. I was able to insert NIB Win. game loads into the die, but unfired Fiocchi hulls were a tighter fit. I also assume you have thoroughly cleaned the left chamber for potential plastic build up.