If you ever get a spare $100 burning a hole in your pocket, consider the Redding dual carbide die.
They basically do what you want but in a uniform, repeatable, elegant manner.
I liked my first one so much I sought out the rarer (at the time) 44 Special version.
They work the brass a lot less than regular dies and you end up with rounds that look professional.
These are made and used in such a way that the magnum and special versions are not interchangeable unlike most sizing dies.

__________________
NEMO
"Everything 44"