I've never done anything except neck size my .308 ammo after the initial firing with new brass. There is a very noticeable improvement in group size after reloading them and neck sizing. I never thought of checking for a velocity difference; interesting that some have noticed that. Btw, neck sizing with a dedicated die works best in a bolt action that allows you to put some force on the round as you chamber it.

When loading for my Contenders I use a full length sizing die and set it to bump the shoulder. Make even a small mistake and the gun will not completely close and it won't fire.


All the labor of man is for his mouth, and yet the appetite is not filled.