Is the brass you are using, fired from the chamber of the rifle you are loading for, or is it just once fired range brass? If it is brass that is fired from that rifle (and hasn’t been shot at 80,000psi) then just touching the shell holder should suffice. What I normally do is try chambering a piece of unsized brass, if it chambers easily then you can set the die anywhere from touching the shell holder to even backed off an 1/8 or 1/4 turn. If the brass is hard to chamber or won’t chamber, then start with the die touching the shell holder, then take the piece of brass and try to chamber it, if it chambers easily that is all you need, if not, screw the die in an 1/8 turn size the brass and try again. If that doesn’t work, then another 1/8 turn and try again. Doing it this way will help avoid over sizing and get you to just where you need to be.
JTD