I have done some step down sizing. You have to do it in steps. It works but it is a pain if you are going more than .002". A very common practice is .452 down to 4.51 and that can be done with the Lee or Saeco push through sizer.

"A quiet hit in the right place is better than a loud miss in the wrong place followed by 10 more shots on the run"

I was a handgun hunter, when handgun wasn't cool.....