"What I do is remove the expander buttonstem, screw the sizing die into the press with a trimmed cartridge in the shellholder, and screw the die down until it contacts the case mouth. ThenI screw it in further a little at a time until I can see that the die is sizing down .277" or so ofthe neck for a .270, etc. This amount of neck sizing can be approximate. It is not too critical, as long as it is sufficient, and all are done the SAME. Then I lock the sizing die in that position, re-install theexpander stem, and size the rst of the cases."

It has worked for me for four decades+. When i get persnicketty and weigh bullets, weigh cases,cut the primer pockets, chamfer the flash holes, chamfer the case mouths and all that other stuff; my re-loads are as accurate as any match ammo out there.