I wanted to check how concentric the bullets were to the case. I placed a .308 round in the shell holder of the L E Wilson trimmer and rotated it, the dial showed a .005 run out After checking more reloads and the some factory ammo I discovered that the hole in the shell holder was not centered in the body. This means that all my trimmed cases were not cut square my dial calipers confirmed this. I returned the shell holder, they had four more in stock, only one was centered.