They have a few different cutters listed for Weatherby cartridges. According to the specs, none of them have a radius grind. The part number reflects the shoulder angle they have.21st century list a cutter #46 (edited and #30 ) for all weatherbys . im guessing its rounded or more round .
http://nebula.wsimg.com/2a18b7b0054...5AA0C95BD1D877538&disposition=0&alloworigin=1
The 21st Century cutters can't be reshaped by most people but you could buy a different brand and reshape them with a radius.