Originally Posted by CRS
Is the main benefit of WSM over Western, velocity?

Shooting higher BC bullets than what's possible with the .270 WSM and its 1:10 twist. There is getting to be a fairly decent list, here are just a few.

Bullets needing 1:9.5-9 twist.

126-141 grain Hammer Hunter and Hunter Tipped

165 grain NLRAB

Bullets needing 1:8 or faster.

148-162 grain Hammer Hunter and Hunter Tipped

175 grain STGK

170 grain Berger EOL

155 grain Barnes LRX