Depends on whether or not you have the Bushing NK die or the Bushing FL die. I have and use the FL die, without bushing. I don't use all the fancy case measuring equipment. I just take a 'snug' case and screw the die down till it touches and give resistance, then lower the ram and case and screw the die in a touch more. Then size the case & shoulder and try it in the rifle. If still snug, I'll just screw the die in a touch more and try again, until the case chambers without resistance. Then neck size with the Lee Collet Die. Works for me, though if you ask how much I bumped the shoulder back, I don't have the actual measurement. But...really...does it matter. Once the body die is set, you are good to go.