I have test them in my 6cm and .308. against CCI BR-2 and Fed 210M. The WR are slightly bigger and go in with more effort than CCI of Fed.
Here are my results shooting 10 rounds each.
6cm Hornady Brass 39.3 gr of H4350, Berger 109Hy
CCI BR2 AVG FPS= 2993.7 SD=8.8 ES= 18.4
Fed 210M...