Thats a very handy form die, I just formed 500 20VT and 500 17 FB from some new unfired LC13 brass basically the same way except I used a Redding 221 from 223 form die, then a Redding 221 FL die, Redding 17M4 #1, for the 20VT then 17FB FL die for the 17FB.
I wish I would have seen those before I like the Idea of just setting up one die and changing bushings.
To get to 17FB took 4 dies or steps but out of 1000 cases I didn't loose a single case, I could have skipped one die the 221FL die but it did make it alot easier.
I used one of those little Harbour freight chop saws to rough cut the case to 1.420 then trimmed them to length on my RCBS trim pro.
Still need to turn the necks and anneal, both my rifles have tight necks.