If I were going to size from 300 wsm it would have to be the lapua brass, and they don't
make it so I use the Winchester 7mm WSM and have no complaints.
I can weight sort the Winchester and end up with matched brass a lot cheaper that
has the right case head stamp on it.
Norma makes good brass but they are proud of it.(twice as much as the Win or Rem brass)
J E CUSTOM