This morning I cast almost a thousand 357 Magnum semi wad-cutters. I tried to run them through my resizing die and almost broke the handle on my RCBS Rock chucker. The mold is a Lee 6 cavity 158 grain semi wadcutter. Why would the bullets come out of the mold at .365 - .372 diameter. After running them through the sizing die it completely wiped off the ribs on the side of the bullet making a solid slug that was pretty damn ugly