Gunsmithing Weatherby #3 contour equivalent

Call benchmark and ask them if they can duplicate the weatherby contour for you. Most barrel makers have CNC lathes and have the dimensions of most factory barrels stored, they just call up the program and the lathe does the rest. If you're trying to match a certain contour it's better to have it done exactly than to try and get "close enough" by using one of their standard profiles.