I was at my reloading desk a few minutes ago and decided to play with my bullets. I had cast and sized about 20 pounds of LEE C430-310RF bullets last spring. I picked up my calipers and a few bullets and got a surprise. My sized .430 bullets measured from .431 to .436. I'm resizing ALL of them to .432. I checked about two hundred bullets. All seemed to have expanded. Is this a common thing? I think I need to resize ALL of my cast bullets. This makes me nervous.