It's odd that the die set came with that size expander ball. What is the manufacturer of the set? Are there any indications on the box that it is a special set? Most manufacturers simply don't make that mistake.
I would strongly suggest taking the ball resizing process slowly. My expander ball is 0.222" (that 1 thousandth of an inch makes a big difference). Maybe size a case and seat a bullet every .001" as you go.
Very nice rifle, by the way. My 788 in 22-250 was the first rifle I started reloading for back in the '60's when they were just starting to sell them. Still have it and will never sell it.