Re: Necking 30-06 Norma to 25
Look at your neck thickness. When you neck down the neck thickness increases. The brass should'nt be too tight in the chamber to release the bullet. If you have a fired case from your chamber measure the outside of the neck and compare to a new case with a bullet seated in it. The fired case should be a thousandth or two bigger than the new case/bullet combo. If the new case/bullet is bigger you will have to reduce neck wall thickness by outside turning or inside reaming.