The best is the Lyman "M" die, it expands the case mouth just enough for cast bullet seating.
Have a Lyman "M" die, a RCBS .309 cast bullet expanding die, and a Lee cast bullet expanding die. The advantage of the Lee is that it can be used to expand many different cases with only one die.
Sometimes you get what you pay for, sometimes you only pay more for what you get.
Three shots are not a "group"...they are a "few".
If the Bible is the literal, infallible, unerring word of God...where are all those witches I am supposed to kill?