Thanks John. I felt like that was right but wasn't absolutely sure.
Cliff, I know this is an older thread, but since you were the one who posted this, after my comment ahead of it...
I picked up a Hornady Universal 20 caliber neck sizing die... quite a while ago... the price was like $20. or less...
To make a 20 Practical, I just take a 223 case, run it thru that die and I've got a 20 Practical...
That is all I bought. I full length size with the 223 with the spindle removed. I also use the 223 seating die to seat 20 caliber bullets...