Using the old Lee hand priming tool or the RCBS variation as the WSM cases don't fit the Lee.
two minutes with a Dremel fixed my Lee priming tool so II could use it for the WSM wildcats and my 300 WSM long range gun.
Of course now I don't own any WSM cased rifles and have no plans to in the future!
I have three Lee Priming tools, and a Hornady- haven't used the Hornady yet, but maybe this summer!
Cat